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Friday, October 30, 2009

3,000-Mile Oil Change Comes Under Fire


Do you hold the view that it is important to change your vehicles motor oil every 3,000-miles?

Read on and consider how the antiquated 3000-mile oil change recommendation is based on old technology and is outdated by many of today’s standards.

Compiled below is information provided by General Motors, California Integrated Waste Management Board, and Amsoil, Inc.

The standard 3,000-mile oil change interval is under attack. Promoted for years by most motor oil companies and quick lube businesses as an essential part of proper vehicle maintenance, the public has become much more skeptical in recent years. In fact, searches for “3,000 mile oil change” in top Internet search engines such as Google and Yahoo! primarily yield articles and blog postings that challenge the practice and refer to it as a “scam” or “myth.”

Note: The video below is helpful in the debate because it demonstrates how it is impossible to tell when motor oil needs to be changed based on the color of the oil alone.



AMSOIL synthetic motor oil was introduced in 1972 as the only motor oil on the market recommended for 25,000-mile/one year drain intervals, and the company has spent much of the last 37 years as the lone voice promoting the benefits of extended drain intervals. However, AMSOIL has recently welcomed an increasing number of companies and organizations to the party. Although they still don’t recommend drain intervals as long as AMSOIL recommendations, the momentum is growing.

Vehicle manufacturers have mostly recommended oil change intervals exceeding 3,000 miles in recent years. In fact, most recommend intervals of 5,000 miles or more. Ford Motor Company recommends drain intervals of 7,500 miles in its model year 2007 and newer vehicles, while other manufacturers incorporate oil monitoring systems in their newer vehicles that allow motorists to extend drain intervals even further.

In its December 2006 issue, Consumer Reports encourages drivers to follow the longer oil change recommendations of vehicle manufacturers, saying, “Although oil companies and quick-lube shops like to promote this idea [that engine oil should be changed every 3,000 miles], it's usually not necessary. Go by the recommended oil-change schedule in your vehicle's owner's manual. Most vehicles driven under normal conditions can go 7,500 miles or more between oil changes. Some models now come with a monitoring system that alerts the driver when the oil needs changing. Depending on driving conditions, these can extend change intervals to 10,000 or 15,000 miles.”

Steve Ritter, senior editor of Chemical & Engineering News, writes, “Conventional wisdom has held that the oil should be changed about every 3,000 miles. This notion has been ingrained into people's heads for decades, in part as a marketing ploy by oil companies. The 3,000-mile interval made sense when engines used single-grade nondetergent oils. But with the latest oils and car designs, it's no longer necessary to change oil that often under normal driving conditions.”

Concerned about the effects of used oil on the environment and responding to research that indicates 73 percent of California drivers change motor oil more often than their vehicle’s manufacturer recommends, the California Environmental Protection Agency and its Integrated Waste Management Board (CIWMB) have emerged as another strong opponent of the 3,000-mile oil change. The group recently launched a public information program and website (www.3000milemyth.org) designed to “bust the 3,000-mile myth” and encourage drivers to reduce used oil volume by following the longer oil drain recommendations of vehicle manufacturers.

“Used motor oil poses a great risk to the environment,” said CIWMB Chair Margo Reid Brown. “With better made cars and the rise of synthetic oils, the 3,000-mile standard is not always recommended.”

Most recently, General Motors announced its support of the CIWMB program to educate drivers about oil change intervals. According to GM, standard 3,000-mile oil change recommendations are based on outdated engine and oil technology, and the company instead recommends changing oil based on its Oil Life System. Currently included on over 97 percent of all GM vehicles sold in the U.S., the GM Oil Life System typically allows drivers to extend drain intervals up to 10,000 miles through use of a computer-based software algorhythm that measures vehicle operating conditions. With 31 million vehicles on the road equipped with the Oil Life System, GM spokesman Tom Henderson claims following its recommendations rather than the 3,000-mile rule could save 100 million gallons of oil annually.



In addition to the environmental benefits associated with less waste oil, extended drain intervals save consumers money. For example, customers who purchase conventional oil at $3 or more per quart, drive 25,000 miles per year and follow 3,000-mile oil change recommendations spend at least $120 per year on oil alone (assuming a five-quart sump capacity). AMSOIL customers who pay $9.15 per quart under the same conditions pay only $61.75 per year.



“When it comes to oil changes, less is more,” claims the CIWMB. “You’ll have more money in your wallet by changing your oil less, and fewer oil changes mean less oil that needs to be safely managed and recycled.”

Premium AMSOIL synthetic motor oils offer the longest drain intervals on the market, unsurpassed protection and performance that effectively extends equipment life and improved fuel economy, saving customers money at the pump and reducing the nation’s dependence on foreign oil.

Work Cited: https://www.amsoil.com/news/2008_aug_3000mileoilchange.pdf

See also: Lube Report, GM, California to Bust '3,000 Mile Myth', Nancy DeMarco, Volume 8, Issue 24, Wednesday, June 11 2008

Yahoo Autos: The 3,000 Mile Oil Change Myth

Amsoil Dealer info:


For more information about AMSOIL synthetic lubricants and performance filtration products contact Anthony Garner at Competition Synthetics. Anthony is an Amsoil T-1 Certified Independent Dealer. E-mail Anthony at compsyn@live.com, or visit http://competitionsynthetics.com

Monday, October 19, 2009

A Look Inside Your Next Oil Filter

A look inside popular motor oil filters. Do you have the best protection and value for your engine?

Note that all filters listed below serve the same application.


Oil Filters Made by Purolator: Bosch, Motorcraft, Mopar, PowerFlo, ProLine, Purolator Premium Plus, Purolator Pure One, Quaker State, MicroGard



Retail Price for Purolator Premium Plus #L14670: $3.99 Auto Zone(1/30/07)


Retail Price for Mopar #MO-090: $4.97 Wal-Mart(1/30/07)


Retail Price for MicroGard #GL14670: $3.48 O"Reilly Auto Parts (10/19/09)

Oil Filters made by Honeywell: Fram Extra Guard, Fram Tough Guard, Fram Double Guard, Fram High Mileage, Pennzoil, Quaker State.



Retail Price for Fram Extra Guard #PH16: $3.99 O"Reilly Auto Parts (10/19/09)

Manufacturer recommended change interval: 5,000-miles


Retail Price for Fram Tough Guard #TG16: $6.29 Auto Zone (1/30/07)

Manufacturer recommended change interval: 7,500-miles


Oil Filters made by WIX: Carquest, NAPA, WIX


Retail Price for WIX #51085: $5.69 O"Reilly Auto Parts (10/19/09)


Oil Filters made byChampion labs: AC Delco, Car and Driver, Champ, Deutsch, STP, K&N, Mobil 1, Royal Purple


Retail Price for Bosch #3402: $5.99 Auto Zone (1/30/07)


Retail Price for STP #S16: $3.19 Auto Zone (1/30/07)


Retail Price for Mobil 1 #M1-204: $12.99 O"Reilly Auto Parts (10/19/09)


Oil Filters made by AMSOIL: Amsoil EaO



Retail Price for Amsoil EAO42: $18.10 Amsoil.com (10/19/09)

Amsoil EAO 42 Service Life

AMSOIL Ea Oil Filters are guaranteed for 25,000 miles or one year, whichever comes first, when used in conjunction with AMSOIL Synthetic Motor Oil. AMSOIL recommends changing the oil filter at the time of oil change.

If used in conjunction with AMSOIL Motor Oil that is being changed at intervals less than 25,000 miles, the EaO Filter should be changed at the same time. AMSOIL EaO Filters are not guaranteed for 25,000 miles when used with any oil other than AMSOIL Motor Oil and should be changed according to vehicle OEM recommendations.

For more on Amsoil EaO oil filters click on the links below:

Superior Filtration Leads to Reduced Costs, Extended Equipment Life

AMSOIL Introduces Donaldson Endurance Air and Oil Filters with Nanofiber Technology



For more information about AMSOIL synthetic lubricants and performance filtration products contact Anthony Garner at Competition Synthetics. Anthony is an Amsoil T-1 Certified Independent Dealer. E-mail Anthony at compsyn@live.com, or visit http://competitionsynthetics.com

The YouTube videos posted here are produced by YouTube user ckermit8, who is not affiliated with Your Next Oil Change or Competition Synthetics

Sunday, October 18, 2009

Synthetic Lubricants

By Tom Schaefer


For most products, the word “Synthetic” is often a negative term, implying cheap, imitation, or artificial - just not up to the “real thing”. In the world of lubrication, however, just the opposite is true. Synthetic lubricants by virtually all measures are distinctly superior to their petroleum counterparts. And while they may be more expensive to buy, their cost saving performance benefits make them less expensive to use. In this market, Synthetic clearly means Premium.


Some definitions

Defining the term “synthetic lubricant” is becoming more controversial these days, but in general it refers to a lubricant or grease whose basestock has been manufactured by chemical synthesis or organic reaction, as opposed to being extracted or refined from naturally occurring oils. In many respects synthetics represent a different approach altogether from conventional petroleum based oils in that their molecular structures are custom designed and tailored to meet specific performance targets. To appreciate this concept better, we need to understand something about the composition of lubricants and how they work.

Most lubricants consist of a basestock and various additives selected to improve or supplement the basestocks’ performance. The basestock is the primary component, usually 70 to 99% of the finished oil or grease, and its properties play a vital role. To a great degree the structure and stability of the basestock dictate the flow characteristics of the oil and the temperature range in which it can operate, as well as many other vital properties such as volatility, lubricity, and cleanliness. Additives enhance these properties or impart new ones, such as improving stability at both high and low temperatures, modifying the flow properties, and reducing wear, friction, rust and corrosion. The basestocks and additives work together and must be carefully selected and balanced to allow the finished oil to do its intended job, which includes protecting moving parts from wear, removing heat and dirt, preventing rust and corrosion, and improving energy efficiency. Since the basestock is the dominate component with the most important role, one obvious way to make a better oil is to start with a better basestock. That is exactly what synthetic oils endeavor to accomplish.

Conventional petroleum basestocks or mineral oils begin with crude oil, a mixture of literally hundreds of different molecules derived from the decomposition of prehistoric plant and animal life. The lighter more volatile components of crude oil are stripped away to make gasoline and other fuels, and the heaviest components are used in asphalt and tar. It’s the middle cuts that have the right thickness or viscosity for lubricants, but first they must be cleaned up; undesirable components such as waxes, unsaturated hydrocarbons, and nitrogen and sulfur compounds must be removed. Modern processing techniques do a pretty good job of removing these undesirable components, good enough for well over 90% of the world’s lubricant applications, but they cannot remove all of the bad actors. And it’s these residual “weak links” that limit the capabilities of mineral oils, usually by triggering breakdown reactions at high temperatures or freezing up when cold. These inherent weaknesses limit the temperature range in which mineral oils can be used and shorten the useful life of the finished lubricant.


Synthetic basestocks, on the other hand, start from relatively pure and simple chemical building blocks which are then reacted together or synthesized into new, larger molecules. The resulting synthetic basestock consists only of the pre-selected molecules and has no undesirable weak links that inhibit performance. This ability to pre-select or design specific ideal molecules tailored for a given job, and then create those molecules and only those molecules, opens a whole new world for making superior basestocks for lubricants. In fact, the entire formulation approach is different: instead of trying to clean up a naturally occurring chemical soup to acceptable levels with a constant eye on cost, the synthetic molecular engineer is able to focus on optimum performance in a specific application with the knowledge that he can build the necessary molecules to achieve it. Since synthetics cost considerably more than petroleum based basestocks, they are generally reserved for problem applications where conventional oils fail, or where the efficiency benefits of synthetics recoup the initial cost.

A bit of history

The use of synthetic basestocks to solve lubrication problems is not new. Various synthetics were developed and used extensively during the second world war to prevent the oil from freezing in the army tanks during winter combat. After the war, synthetics were found to be essential for the new jet engines which ran too hot for mineral oils, causing them to burn off rapidly and leave deposits. These jet engines also had to be able to restart at high altitudes where temperatures were often -50°F, so the oil had to be pumpable at very low temperatures as well as surviving the searing temperatures within the engine. Indeed the modern jet engine would not exist today if not for the simultaneous development of synthetic basestock technology in the 1950s, and today virtually every jet engine in the world operates exclusively on synthetic lubricants.

During the 1960s and 70s, synthetics moved steadily into severe industrial applications where they solved high temperature deposit problems with air compressors and oven conveyor chains, and low temperature flow problems in arctic climates. New synthetic chemistries emerged to meet and match every problem industrial users could create, and there were many! Gradually these expensive high-tech synthetic lubricants were entering the mainstream and taken seriously as they proved their ability to save money through reduced downtime, less maintenance costs, extended equipment life, lower energy consumption, and higher productivity. Focus shifted to the total cost of lubrication, not just the cost of the lubricant, and synthetics were often the winners.

Synthetic automobile motor oils were introduced in the early 1970s with such fantastic performance claims that they initially turned the auto manufacturers and oil companies against the new unproven products. While most claims were directionally valid, the level of improvements were often exaggerated to the point of fostering a “snake oil” reputation. Over the ensuing years, the true benefits of synthetic motor oils were identified and quantified to industry satisfaction and include better high temperature stability, improved low temperature flow characteristics, lower volatility, increased fuel efficiency, and extended life capability. Today car manufacturers and oil companies alike readily acknowledge the superior performance of synthetic motor and gear oils, especially in fleet or severe duty usage. For the average car owner, however, driving conditions are mild enough for conventional mineral oils to work satisfactorily, which raises the question of whether synthetic benefits are really needed for passenger cars and worth the higher price tag. In most cases the combined improvements will repay the higher initial cost, especially in severe duty applications, but since these improvements are not readily perceived by the driver, market penetration remains only a few percent after more than thirty-five years of active marketing. Synthetic motor oil usage will likely accelerate in future years as engine builders exploit the benefits in new engine design and ratchet up oil performance through tighter specifications.

In summary

Today the use of synthetic lubricants is accepted, widespread, and rapidly growing as their capability and cost efficiency benefits become better known worldwide. Jet aircraft use synthetic oils in the engines, hydraulic systems, instruments and landing gears; compressors use synthetics in the crankcase and cylinders; refrigeration systems use synthetics with the new environmentally friendly refrigerants; truck fleets use synthetics in the engine, transmission, and gear box; and the list goes on and on. Wherever a problem exists with mineral oils or a potential for improved cost efficiency uncovered, there is a synthetic lubricant ready and able to step in and lower the cost of total lubrication.

ESTERS IN SYNTHETIC LUBRICANTS

By Tom Schaefer

In the simplest terms, esters can be defined as the reaction products of acids and alcohols. Thousands of different kinds of esters are commercially produced for a broad range of applications. Within the realm of synthetic lubrication, a relatively small but still substantial family of esters have been found to be very useful in severe environment applications. This paper shall provide a general overview of the more common esters used in synthetic lubricants and discuss their important benefits and utilities.

Esters have been used successfully in lubrication for more than 60 years and are the preferred stock in many severe applications where their benefits solve problems or bring value. For example, esters have been used exclusively in jet engine lubricants worldwide for over 50 years due to their unique combination of low temperature flowability with clean high temperature operation. Esters are also the preferred stock in the new synthetic refrigeration lubricants used with CFC replacement refrigerants. Here the combination of branching and polarity make the esters miscible with the HFC refrigerants and improves both low and high temperature performance characteristics. In automotive applications, the first qualified synthetic crankcase motor oils were based entirely on ester formulations and these products were quite successful when properly formulated. Esters have given way to PAOs in this application due to PAOs lower cost and their formulating similarities to mineral oil. Nevertheless, esters are often used in combination with PAOs in full synthetic motor oils in order to balance the effect on seals, solubilize additives, reduce volatility, and improve energy efficiency through higher lubricity. The percentage of ester used can vary anywhere from 5 to 25% depending upon the desired properties and the type of ester employed.

The new frontier for esters is the industrial marketplace where the number of products, applications, and operating conditions is enormous. In many cases, the very same equipment which operates satisfactorily on mineral oil in one plant could benefit greatly from the use of an ester lubricant in another plant where the equipment is operated under more severe conditions. This is a marketplace where old problems or new challenges can arise at any time or any location. The high performance properties and custom design versatility of esters is ideally suited to solve these problems. Ester lubricants have already captured certain niches in the industrial market such as reciprocating air compressors and high temperature industrial oven chain lubricants. When one focuses on temperature extremes and their telltale signs such as smoking and deposits, the potential applications for the problem solving ester lubricants are
virtually endless.


Ester Chemistry

In many ways esters are very similar to the more commonly known and used synthetic hydrocarbons or PAOs. Like PAOs, esters are synthesized from relatively pure and simple starting materials to produce predetermined molecular structures designed specifically for high performance lubrication. Both types of synthetic basestocks are primarily branched hydrocarbons which are thermally stable, have high viscosity indices, and lack the undesirable and unstable impurities found in conventional petroleum based oils. The primary structural difference between esters and PAOs is the presence of multiple ester linkages (COOR) in esters which impart polarity to the molecules. This polarity affects the way esters behave as lubricants in the following ways:

1) Volatility: The polarity of the ester molecules causes them to be attracted to one another and this intermolecular attraction requires more energy (heat) for the esters to transfer from a liquid to a gaseous state. Therefore, at a given molecular weight or viscosity, the esters will exhibit a lower vapor pressure which translates into a higher flash point and a lower rate of evaporation for the lubricant. Generally speaking, the more ester linkages in a specific ester, the higher its flash point and the lower its volatility.

2) Lubricity: Polarity also causes the ester molecules to be attracted to positively charged metal surfaces. As a result, the molecules tend to line up on the metal surface creating a film which requires additional energy (load) to wipe them off. The result is a stronger film which translates into higher lubricity and lower energy consumption in lubricant applications.

3) Detergency/Dispersency: The polar nature of esters also makes them good solvents and dispersants. This allows the esters to solubilize or disperse oil degradation by-products which might otherwise be deposited as varnish or sludge, and translates into cleaner operation and improved additive solubility in the final lubricant.

4) Biodegradability: While stable against oxidative and thermal breakdown, the ester linkage provides a vulnerable site for microbes to begin their work of biodegrading the ester molecule. This translates into very high biodegradability rates for ester lubricants and allows more environmentally friendly products to be formulated.

Another important difference between esters and PAOs is the incredible versatility in the design of ester molecules due to the high number of commercially available acids and alcohols from which to choose. For example, if one is seeking a 6 cSt synthetic basestock, the choices available with PAOs are a straight cut 6 cSt or a “dumbbell” blend of a lighter and heavier PAO. In either case, the properties of the resulting basestock are essentially the same. With esters, literally dozens of 6 cSt products can be designed each with a different chemical structure selected for the specific desired property. This allows the “ester engineer” to custom design the structure of the ester molecules to an optimized set of properties determined by the end customer or application. The performance properties that can be varied in ester design include viscosity, viscosity index, volatility, high temperature coking tendencies, biodegradability, lubricity, hydrolytic stability, additive solubility, and seal compatibility.

As with any product, there are also downsides to esters. The most common concern when formulating with ester basestocks is compatibility with the elastomer material used in the seals. All esters will tend to swell and soften most elastomer seals however, the degree to which they do so can be controlled through proper selection. When seal swell is desirable, such as in balancing the seal shrinkage and hardening characteristics of PAOs, more polar esters should be used such as those with lower molecular weight and/or higher number of ester linkages. When used as the exclusive basestock, the ester should be designed for compatibility with seals or the seals should be changed to those types which are more compatible with esters.

Another potential disadvantage with esters is their ability to react with water or hydrolyze under certain conditions. Generally this hydrolysis reaction requires the presence of water and heat with a relatively strong acid or base to catalyze the reaction. Since esters are usually used in very high temperature applications, high amounts of water are usually not present and hydrolysis is rarely a problem in actual use. Where the application environment may lead to hydrolysis, the ester structure can be altered to greatly improve its hydrolytic stability and additives can be selected to minimize any effects.

The following is a discussion of the structures and features of the more common ester families used in synthetic lubrication.

Diesters

Diesters were the original ester structures introduced to synthetic lubricants during the second World War. These products are made by reacting monohydric alcohols with dibasic acids creating a molecule which may be linear, branched, or aromatic and with two ester groups. Diesters which are often abbreviated DBE (dibasic acid esters) are named after the type of dibasic acid used and are often abbreviated with letters. For example, a diester made by reacting isodecyl alcohol with adipic acid would be known as an “adipate” type diester and would be abbreviated “DIDA” (Diisodecyl Adipate).

Adipates are the most widely used diesters due to their low relative cost and good balance of properties. They generally range from about 2.3 to 5.3 cSt at 100°C and exhibit pour points below -60°C. The viscosity indices of adipates usually run from about 130 to 150 and their oxidative stability, like most of the diesters, are comparable to PAOs. The primary difference between adipate diesters and PAOs is the presence of two ester linkages and the associated polarity benefits outlined previously. The most common use of adipate diesters is in combination with PAOs in numerous applications such as screw compressor oils, gear and transmission oils, automotive crankcase oils, and hydraulic fluids. Adipates are also used as the sole basestock where biodegradability is desired or high temperature cleanliness is critical such as in textile lubricants and oven chain oils.

Azelates, sebacates, and dodecanedioates are similar to adipates except that in each case the carbon chain length (backbone) of the dibasic acid is longer. This “backbone stretching” significantly increases viscosity index and improves the lubricity characteristics of the ester while retaining all the desirable properties of the adipates. The only downside to these types of diesters is price which tends to run about 50 - 100+% higher than adipates at the wholesale level. This group of linear DBEs are mainly used in older military specifications and where the lubricity factor becomes an important parameter.

Phthalates are aromatic diesters and this ring structure greatly reduces the viscosity index (usually well below 100) and eliminates most of the biodegradability benefit. In all other respects, phthalates behave similar to other diesters and are about 20 - 30% lower in cost. Phthalates are used extensively in air compressor lubricants (especially the reciprocating type) where low viscosity index is the norm and low cost clean operation is desirable.

Dimer acid is made by combining two oleic acids which creates a large branched dibasic acid from which interesting diesters are made. Dimerates exhibit high viscosity and high viscosity indices while retaining excellent low temperature flow. Compared to adipates, dimerates are higher in price (30 - 40%), have marginal biodegradability, and are not as clean in high temperature operations. Their lubricity is good and they are often used in synthetic gear oils and 2-cycle oils.

The alcohols used to make diesters will also affect the properties of the finished esters and thus are important factors in the design process. The alcohols may be reacted alone or blended with other alcohols to form coesters with their own unique properties. The first three alcohols in the table above all contain eight carbons, and when reacted with adipic acid, all create a dioctyl adipate. However, the properties are entirely different. The n-octyl adipate would have the highest viscosity and the highest viscosity index (about 50% higher then the 2-ethylhexyl adipate) but would exhibit a relatively high freeze point making their use in low temperature applications virtually impossible. By branching the octyl alcohol, the other two DOAs exhibit no freeze point tendencies and have pour points well below -60°C. The isooctyl adipate offers the best balance of properties combining a high viscosity index with a wide temperature range. The 2-ethylhexyl adipate has a VI about 45 units lower and a somewhat higher volatility. These examples demonstrate the importance of combining the right alcohols with the right acids when designing diester structures and allows the ester engineer a great deal of flexibility in his work.

Polyol esters

The term “polyol esters” is short for neopentyl polyol esters which are made by reacting monobasic acids with polyhedric alcohols having a neopentyl structure. The unique feature of the structure of polyol ester molecules is the fact that there are no hydrogens on the beta-carbon. Since this “beta-hydrogen” is the first site of thermal attack on diesters, eliminating this site substantially elevates the thermal stability of polyol esters and allows them to be used at much higher temperatures. In addition, polyol esters usually have more ester groups than the diesters and this added polarity further reduces volatility and enhances the lubricity characteristics while retaining all the other desirable properties inherent with diesters. This makes polyol esters ideally suited for the higher temperature applications where the performance of diesters and PAOs begin to fade.

Like diesters, many different acids and alcohols are available for manufacturing polyol esters and indeed an even greater number of permutations are possible due to the multiple ester linkages. Unlike diesters, polyol esters (POEs) are named after the alcohol instead of the acid and the acids are often represented by their carbon chain length. For example, a polyol ester made by reacting a mixture of nC8 and nC10 fatty acids with trimethylolpropane would be referred to as a “TMP” ester and represented as TMP C8C10.

Each of the alcohols shown above have no beta-hydrogens and differ primarily in the number of hydroxyl groups they contain for reaction with the fatty acids. The difference in ester properties as they relate to the alcohols are primarily those related to molecular weight such as viscosity, pour point, flash point, and volatility. The versatility in designing these fluids is primarily related to the selection and mix of the acids esterified onto the alcohols.

The normal or linear acids all contribute similar performance properties with the physicals being influenced by their carbon chain length or molecular weight. For example, lighter acids such as valeric may be desirable for reducing low temperature viscosity on the higher alcohols, or the same purpose can be achieved by esterifying longer acids onto the shorter alcohols. While the properties of the normal acids are mainly related to the chain length, there are some more subtle differences among them which can allow the formulator to vary such properties as thermal stability and lubricity.

Branched acids add a new dimension since the length, location, and number of branches all impact the performance of the final ester. For example, a branch incorporated near the acid group may help to hinder hydrolysis while multiple branches may be useful for building viscosity, improving low temperature flow, and enhancing thermal stability and cleanliness. The versatility of this family is best understood when one considers that multiple acids are usually co-esterified with the polyol alcohol allowing the ester engineer to control multiple properties in a single ester. Indeed single acids are rarely used in polyol esters because of the enchanced properties that can be obtained through co-esterification.

Polyol esters can extend the high temperature operating range of a lubricant by as much as 50 - 100°C due to their superior stability and low volatility. They are also renowned for their film strength and increased lubricity which is useful in reducing energy consumption in many applications. The only downside of polyol esters compared to diesters is their higher price tag, generally 20 - 70+% higher on a wholesale basis.

The major application for polyol esters is jet engine lubricants where they have been used exclusively for more than 40 years. In this application, the oil is expected to flow at -65°C, pump readily at -40°C, and withstand sump temperature over 200°C with drain intervals measured in years. Only polyol esters have been found to satisfy this demanding application and incorporating even small amounts of diesters or PAOs will cause the lubricant to fail vital specifications.

Polyol esters are also the ester of choice for blending with PAOs in passenger car motor oils. This change from lower cost diesters to polyols was driven primarily by the need for reduced fuel consumption and lower volatility in modern specifications. They are sometimes used in 2-cycle oils as well for the same reasons.

In industrial markets polyol esters are used extensively in synthetic refrigeration lubricants due to their miscibility with non-chlorine refrigerants. They are also widely used in very high temperature operations such as industrial oven chains, tenter frames, stationary turbine engines, high temperature grease, fire resistant transformer coolants, fire resistant hydraulic fluids, and textile lubricants.

In general, polyol esters represent the highest performance level available for high temperature applications at a reasonable price. Although they cost more than many other types of synthetics, the benefits often combine to make this chemistry the most cost effective in severe environment applications. The primary benefits include extended life, higher temperature operation, reduced maintenance and downtime, lower energy consumption, reduced smoke and disposal, and biodegradability.


Other esters

While diesters and polyol esters represent the most widely used ester families in synthetic lubrication, two other families are worth mentioning. These are monoesters and trimellitates.

Monoesters are made by reacting monohydric alcohols with monobasic fatty acids creating a molecule with a single ester linkage and linear or branched alkyl groups. These products are generally very low in viscosity (usually under 2 cSt at 100°C) and exhibit extremely low pour points and high VIs. The presence of the ester linkage imparts polarity which helps to offset the high volatility expected with such small molecules. Hence, when compared to a hydrocarbon of equal molecular weight, a monoester will have a significantly higher flash point giving it a broader temperature range in use. Monoesters are used primarily for extremely cold applications such as in Arctic hydraulic oils and deep sea drilling. They can also be used in formulating automotive aftermarket additives to improve cold starting.

Trimellitates are aromatic triesters which are similar to the phthalates described under diesters but with a third ester linkage. By taking on three alcohols, the trimellitates are significantly more viscous then the linear adipates or phthalates. Viscosities range from about 9 to 20 cSt at 100°C. Like phthalates, trimellitates have a low viscosity index and poor biodegradability with a price range between adipates and polyols. Trimellitates are generally used where high viscosity is needed as in gear lubricants, chain lubricants, and grease.

Summary

Esters are a broad and diverse family of synthetic lubricant basestocks which can be custom designed to meet specific physical and performance properties. The inherent polarity of esters improves their performance in lubrication by reducing volatility, increasing lubricity, providing cleaner operation, and making the products biodegradable. A wide range of available raw materials allow an ester designer the ability to optimize a product over a wide range of variables in order to maximize the performance and value to the client. They may be used alone in very high temperature applications for optimum performance or blended with PAOs or other synthetic basestocks where their complementary properties improve the balance of the finished lubricant. Esters have been used in synthetic lubricants for more than 60 years and continue to grow as the drive for efficiency make operating environments more severe. Because of the complexity involved in the designing, selecting, and blending of an ester basestock, the choice of the optimum ester should be left to a qualified ester engineer who can better balance the desired properties.

Saturday, October 17, 2009

Base Oils & Lubricant Performance

By Anthony Garner

Introduction

The purpose of this thread is to open up productive conversation into the various kinds of base oils used in motor oil finished products. We will also look at how automotive lubricants are marketed as well as theory into lubricant heat control and friction reduction. This thread is not intended to be the final word, but rather an ongoing discussion where all are encouraged to contribute. Please provide links and or cited sources whenever possible.


Motor Oil Base Stocks

Base Stock: A motor oil base stock is usually refined from petroleum or a selected synthetic material. It is the main foundational component of the oil into which additives are blended to create a finished lubricant. Currently, the American Petroleum Institute (API) divides motor oil base stocks up into five separate group categories listed below.



Theory: Conventional Motor Oil

"Conventional lubricants are refined from crude oil. Refining is a process of physically separating light from heavy oil fractions. Crude oil is a natural substance. It contains millions of different kinds of molecules. Many are similar in weight but dissimilar in structure. Because refining separates products by weight, it groups molecules of similar weight and dissimilar structure, so refined lubricants contain a wide assortment of molecules.

However, not all of those molecules are beneficial to the lubrication process. Some of the molecules found in refined lubricants are detrimental to the lubricated system or to the lubricant itself. For example, paraffin, a common refined lubricant component, causes refined lubricants to thicken and flow poorly in cold temperatures. Some refined lubricant molecules also may contain sulfur, nitrogen, and oxygen, which act as contaminants and invite the formation of sludge and other by-products of lubricant breakdown." - Amsoil, Inc.

Theory: Synthetic Motor Oil

"Synthetic lubricants are not refined. They are chemically engineered from pure chemicals.

Pure – Because they are derived from pure chemicals. Synthetic lubricants contain no contaminants or molecules that “don’t pull their own weight.”

Uniform – Because synthetics contain only smooth lubricating molecules, they slip easily across one another. On the other hand, the potpourri of jagged, irregular and odd-shaped molecules of refined lubricants don’t slip quite so easily. The case with which lubricant molecules slip over one another affects the lube’s ability to reduce friction, which in turn, affects wear control, heat control and fuel efficiency.

Heat Control – Because uniformly smooth synthetic lubricant molecules slip easily over one another, they are superior friction-reducers to conventional lubricants. (Technically, because they slip more easily over one another, synthetics are said to have a lower “coefficient of friction” than conventional lubricants.) The less friction in a system, the less heat in it, too. Friction and heat are two major contributors to component failure and wear. By controlling friction and heat more effectively, synthetics significantly reduce the incidence of component failure and significantly reduce the rate of component wear." Amsoil, Inc.



The “Synthetic” Controversy


The topic of base oils and their perspective level of performance is generally a controversial topic among motor oil enthusiasts and on up through oil industry experts. Even defining what “synthetic” means results in controversy. Evidence of this can be seen by the conflicting comments made by oil industry experts after the much famed 1999 National Advertising Division (NAD) cases which defined the way synthetic lubricants would be labeled in the United States. In short, the result of the case ruled in favor of Castrol North America Inc. against the claim made by Mobil Oil Corp., that Castrol was not truthful in their advertising. The NAD ruling ultimately changed the way synthetic lubricants would be marketed in the United States setting the stage for what are known as group III lubricants to be labeled as synthetic. See the full two part article, A Defining Moment For Synthetics. Many would agree that the implication of the ruling blurs the lines of what a true synthetic lubricant really is and the levels of performance potential among the various base oil categories. In addition, some argue that this ultimately gives oil industry marketing the upper hand and leaves consumers at a disadvantage. A trip the local auto parts store reveals a dizzying array of synthetic motor oil choices. Terms like Full Synthetic, 100% Synthetic, Semi-Synthetic, Synthetic Blend and Synthetic Plus all grace the covers of motor oil bottles. Without further research, this often leaves one to wonder which version of synthetic motor oil best suites their specific application. Research into synthetic motor oils may also lead one to decide that top tier synthetic lubricants are not the best value for their dollar, while others may draw the conclusion that they will use nothing but top tier synthetics. The reality is that when considering such variables as driving habits, climate conditions, and equipment design, some motor oils fit some applications better than others, having their own proprietary blend of base oils and additives which make for a unique finished product.

For comparison, we will use three different motor oils as examples to help illustrate how motor oils are formulated using the various base stocks, how they are marketed, their associated cost, and discuss the perceived levels of performance each lubricant has.


Lubricant #1: Conventional Motor Oil

Chevron Supreme SAE 5W-30 API (SM)
Base stock – API Group II
Retail price per quart $2.99

Base Stock Origin: Refined from crude oil.

Today, conventional motor oils are formulated with Group II base stocks.

Other examples of Group II motor oils include but are not limited to Pennzoil (Yellow Bottle), Castrol GTX, Quaker State Peak Performance, Valvoline Conventional, Schaeffer Supreme 7000 Synthetic Plus, Brad Penn, and Shell Rotella T.

Note A: Advancements in oil technology like those pioneered by the Chevron Corporation have greatly improved the quality of conventional motor oils and have given way to group III synthetic motor oils. Read more on group II and III oil technologies at Chevron U.S.A Inc. and Shell Oil Company. Some have argued that this type of technology has closed the gap in performance between conventional motor oil and top tier synthetic lubricants.

Note B: Retail pricing provided by CSK Auto, Inc., and Amsoil, Inc., as of 10/18/09

Lubricant #2: Full Synthetic Motor Oil

Pennzoil Platinum SAE 5W-30
Base stock - API Group III
Retail price per quart $6.99

Base Stock Origin: Refined from crude oil.

Group III oils are refined from crude oil and are commonly marketed as “Full Synthetic” motor oil.

Other examples of Group III motor oils include Castrol Syntec, Amsoil Extended Life Synthetic Motor Oil, Schaeffer Supreme 9000 Full Synthetic, Shell Rotella T Synthetic, and Royal Purple High Performance Motor Oil.

Refer to notes A and B


Lubricant #3: 100% Synthetic Motor Oil

AMSOIL 100% Synthetic SAE 5W-30 Motor Oil
Base stock - API Group IV/V
Retail price per quart $8.75

Base Stock Origin: Pure chemicals derived from Crude Oil or Natural Gas.

Other examples of Group IV/V motor oils include Red Line, Royal Purple eXtreme Performance (XPR) Racing Oil, and Mobil 1.

Refer to note B.

100% Synthetic motor oils are often referred to as Top Tier Synthetics or Polyalpholefin (PAO) group IV based lubricants. Although PAO Group IV base stocks are not refined from crude oil like Group II and III oils are, there can still be some basis in crude oil. Ethylene is a colorless gas that is commonly derived from crude oil or natural gas. In addition to being a building block for Group IV synthetic base stocks, other products made from the ethylene family can also include plastics and rubber. Group V Ester oils are commonly used as additives in PAO based synthetic motor oils to improve various aspects of the finished product. See also Esters In Synthetic Lubricants. Finally, while many companies utilize PAOs in their finished products either as the main base stock or as an additive, there are only four companies currently in the United States that produce PAOs. According to the October 29, 2008 edition of Lube Report, producers of PAOs in the US include Chevron Phillips Chemical, ExxonMobil Chemical, Ineos Oligomers, and Chemtura. See also, Synthetic Lubricants.


Debate: Friction and Heat

Another area of debate among the oil industry experts is how the various base stocks perform with respect to coefficient of friction and heat reduction. For some, the conclusion has been made that with the advancements in base stock technology, there is little or no difference with respect to coefficient of friction and heat reduction between Group II/Group III and Group IV oils. However, this argument does not hold true for others. Some experts have indicated that PAO oils, or PAO oils blended with Ester oils both offer friction reducing abilities. Further, the purported added benefits of using a motor oil with friction reducing abilities include increased horsepower , higher rpm range, improved fuel economy, and lengthened engine component life. Provided below is responses from oil industry experts Tom Schaefer, formerly of the Hatco Corporation, and Ed Kellerman, manager of Oil Analyzers Inc., a subsidiary of Amsoil, Inc. Also provided is a related experience from an automotive Internet forum member.

Below, Ed Kellerman and Tom Schaefer comment about base oil characteristics with regards to Group IV Synthetic motor oils and friction reduction when compared to modern day Group II conventional motor oils.

"If we are talking just straight base stock, with no other additives, then group IV basestocks reduce friction far greater than groups II or III. You are correct: it’s a function of even molecular structure vs. molecules of all different shapes and sizes. The base stock argument, however, is for the most part irrelevant, in that there is so much more to a finished engine oil than just the base stock. It is possible to take a lesser base stock and improve anti-frictional characteristics by using high quality additives such as viscosity index improvers, anti-wear additives, friction modifiers, etc... Conversely, you can have a super high quality group IV base stock that if formulated with inferior additives and not formulated correctly, may not offer higher performance than a properly formulated group III finished engine oil. This is what makes the basestock argument irrelevant when it comes to the performance of a finished oil. AMSOIL engine oils are made from the finest base stocks and additives and there is no way any finished group II or III engine oil could come close." - Ed Kellerman

"A good group IV formulation will run cooler. This is not as important, however, as the fact that a group IV are far more resistant to thermal breakdown in high heat conditions, thereby offering far superior protection compared to groups II and III.

An oil's effect on engine temperature is a function of viscosity, coefficient of friction, and heat transfer properties. I don't doubt that these properties are similar among group I - IV hydrocarbons as they are all in the same chemical family, that is, there would be some differences based on such factors as aromatic content and molecular weight distribution, but the differences should be relatively small. Between different chemical families, however, the differences can be significant. Esters, for example, have significantly lower coefficients of friction and better heat transfer rates than most hydrocarbons, and much lower engine oil temperatures were frequently reported from the original all ester formulations back in the 1970s.

Since modern synthetic oils today are based almost entirely on hydrocarbon base oils, I wouldn't expect to see much difference in engine temperatures when viscosities are equal, especially since friction modifier additives are more potent than the base oils. That being said, those formulations with larger quantities of esters or ANs may indeed show some lowering of friction and temperatures." - Tom Schaefer
An automotive Internet forum member describes his experiences with lower engine operating temperatures when comparing conventional and synthetic motor oils.
"I work on an off-road race truck and we run oil temp gauges and found the following: During a fifteen minute race our oil temps would get up to 300+ if using any non synthetic oils. Mobil 1 dropped the oil temps by about twenty degrees to 280 and switching to Amsoil we dropped it to about 250-260 .......this is not representative of everyday usage but keep in mind that the water temp stays always in between 180-200 at all times no matter which oil.....so all in all it is kind of an accepted opinion that Mobil 1 is the cheapest and least effective of the synthetics but all of the higher end oils.......Amsoil, Royal Purple, etc. work better under extreme conditions. I guess it all depends on what your uses are. I just have my own opinions formed because of the info stated above." - LS1.com, Liquifire
Kellerman and Schaefer’s statements show slightly differing views with respect to the coefficient of friction of oil base stocks in their own right. However, both men seem to agree that a properly formulated lubricant with a quality additive package will provide improved anti-friction capabilities when compared to other lubricants using lower-grade additives. The exact rate to which friction reduction occurs between dissimilar finished lubricants is currently unknown. Further, a request was made for any relevant test data or studies on this subject, but none have been provided or located as of this writing. Mr. Kellerman did offer to review any information that would indicate no difference in friction reducing performance between GroupII/GroupIII and Group IV oils.

Further Discussion

While using cost effective Group II/III refined crude oil lubricants in mild-to-mid range performance applications can provide satisfactory results, other more demanding applications may gain additional benefits from utilizing Group IV based oils. Some example include, cooler engine operating temperatures, increased power and rpm ranges through friction reduction, lengthened oil change intervals, and better volatility and cold flow properties. Hopefully, after reading this post, one will come away with greater understanding and appreciation of what goes into producing a balanced lubricant, why some are cost effective, and why costly alternatives may offer a degree of increased performance potential.


For more information about AMSOIL synthetic lubricants and performance filtration products contact Anthony Garner at Competition Synthetics. Anthony is an Amsoil T-1 Certified Independent Dealer. E-mail Anthony at compsyn@live.com, or visit http://competitionsynthetics.com

A Defining Moment For Synthetics


By Katherine Bui

Published October 1999 Lubricants World

Part 1

While the field is not wide open, a new ruling confirms that the definition of "synthetic" is still largely in the hands of marketers.

Synthetic. The word has become almost a proscription in the industry, especially among scientific and technical organizations, such as the Society of Automotive Engineers (SAE) and the American Petroleum Institute (API).

Ask a marketer of motor oil products formulated with hydroprocessed mineral oils, and you might get a definition that involves cost-efficiencies and consumer choices. Ask an engineer involved in manufacturing polyalphaolefins (PAOs) or esters, and composition might be the determining factor. Despite the intense debate over the origins of synthetics, an absolute definition has remained in limbo for many years, with much of the responsibility placed on base oil manufacturers and lubricant marketers.

It was only recently, in a decision by the National Advertising Division (NAD) of the Council of Better Business Bureaus, that the first basic action and ruling in the United States set a strong precedence for a broader description in the marketing of synthetics. In this first installment of a two-part story, Lubricants World takes a look at the NAD's ruling and explores the revived debate surrounding the definition of "synthetic."

The Ruling
In a ruling released April 1999, the NAD addressed complaints filed by Mobil Oil Corp. regarding the truthfulness of Castrol North America Inc.'s claim that its Syntec® provides "superior engine protection" to all other motor oils, both synthetic and conventional, and that Syntec's esters provide "unique molecular bonding." Mobil charged that the advertisements inaccurately represented that the current formulation of Syntec is synthetic. The challenge was filed based on statements Castrol made in a series of television commercials, Web site publications, package labels, and brochures.

The NAD divided its decision to address three issues raised in the complaint. Is the reformulated Syntec synthetic motor oil? Has Castrol substantiated its superiority claims? Has Syntec been degraded?

Synthetic?
The NAD determined that the evidence presented by the advertiser constitutes a reasonable basis for the claim that Castrol Syntec, as currently formulated, is a synthetic motor oil. NAD noted that Mobil markets hydroisomerized basestocks as synthetic in Europe and elsewhere. NAD noted that the action taken by the SAE to delete any reference to "synthetic" in its description of basestocks in section J354 and API's consequent removal of any mention of "synthetic" in API1509 were decisions by the industry not to restrict use of the term "synthetic" to the definition now proffered by Mobil. Further, the SAE Automotive Lubricants Reference Book, an extensively peer-reviewed publication, states base oils made through the processes used to create Shell's hydroisomerized basestock, severe cracking, and reforming processes may be marketed as "synthetic."

Superior?
Despite its prior ruling, the NAD advised that Syntec could not advertise a superior protection claim.

Degraded?
The NAD determined that though Mobil presented clear evidence that Castrol has made a major change to Syntec's formulation, it was not sufficient to demonstrate that Syntec has been "degraded."

Industry Reaction
In a statement to Lubricants World, Castrol's legal counsel said, "The NAD's decision was clearly correct. In accepting Castrol's position on the appropriate definition of synthetic basestock and concluding that Castrol Syntec is a fully synthetic oil, the NAD accepted the overwhelming evidence Castrol presented, which included the opinions of leading scientists . . .and statements from Shell, Exxon, and other industry sources. The NAD also relied on the SAE's rejection of a restrictive definition of the type advanced by Mobil. In fact, although it had the right to do so, Mobil did not attempt to appeal the NADS's decision."

Mark Sztenderowicz, a senior research engineer from Chevron Products Co.'s Base Oil Technology Team, stated his company agreed with the NAD's decision. "We feel strongly," he said, "that 'synthetic' is a fairly broad term and a number of basestocks besides PAOs fit the description. To the extent that the NAD came to a similar conclusion and was unwilling to limit 'synthetic' to a narrow definition, we agree. We further agree with what we consider to be a commonsense interpretation that consumers perceive the word 'synthetic' to mean something man-made, but not made necessarily from a particular compound or component."

The Complaint

Mobil's Position
Mobil contended that Castrol misleads consumers that Syntec is a fully synthetic motor oil despite the fact that Syntec is no longer synthetic. The challenger alleged that after years of manufacturing Syntec with PAO, Castrol replaced the PAO, which had constituted nearly 70% of the volume of the product, with hydroprocessed mineral oil in approximately December 1997. As a result of an independent laboratory test conducted by Savant Inc., Mobil maintained that samples of Syntec purchased in June and December 1997 contained 93% and 80% PAO. Other samples of Syntec, one purchased in December 1997 and four purchased in 1998, contained no PAO, and instead contained 100% mineral oil.

Furthermore, Mobil alleged that Castrol degraded Syntec by substituting hydroprocessed mineral oil for PAO to the detriment of the consumer. Even though Syntec was able to meet the minimum industry standards, Mobil contended that in no way does it prove the current Syntec is as good as it was when it was made with PAO.

Castrol's Position
Castrol defended its claim that Castrol Syntec is synthetic based on the nature of the basestocks used in the formulation (Shell's hydroisomerized basestocks). This is substantiated by the opinions of chemistry experts; authorities from Shell and Exxon; the SAE's Automotive Lubricants Reference Book; a paper by Dr. Martin Voltz, a Mobil scientist; and an independent motor oil expert. Castrol also contends that its data show the current formulation of Syntec provides more protection than the old formulation and is, in fact, superior to Mobil 1®, Mobil's synthetic oil.

In response to Mobil's contention that Castrol deceived its consumers by not informing them of the change in the formulation, the advertiser submitted a statement by Richard Kabel, a motor oil expert. Kabel asserted that motor oil manufacturers, including Mobil, regularly make changes in their formulations without disclosing these changes to consumers. He stated that the industry certification and licensing program is designed to provide motor oil manufacturers with the flexibility to modify their formulations as long as the oil continues to meet industry standards.

The Definition of "Synthetic"
The debate regarding the use of the word "synthetic" created a tumult in the early 1990s when a push by the lubricants industry urged the API and the SAE to set a standard or official definition for the material. The argument centered on the development of very high viscosity index (VHVI) base oils that some argued provided properties similar to PAOs but cost only half as much. VHVIs or hydroisomerized basestocks are created by chemically converting the molecules of a selected feedstock to a different set of molecules, predominantly through chemical rearrangement or decomposition of the structure of the feed molecules. PAOs are derived from a chemical process that combines small molecules to make larger complex molecules of a desired type.

SAE, unable to resolve the debate, stripped references to the word "synthetics" from its terminology books and guides (J357) in 1995 and 1996, respectively. The API eliminated references to "synthetic" from its Engine Oil Licensing and Certification System (API1509).

Mobil's Definition
In the complaint filed by Mobil against Castrol's Syntec, the PAO manufacturer contended true synthetics had to be formulated from small molecules subject to a chemical reaction, not built from natural petroleum.

Mobil submitted testimony from Professor J.M. Perez, a lubrication and technology expert from Pennsylvania State University, who told the NAD that true synthetics require "the formation of chemical products from simple well-defined molecules by synthesis or chemical reaction." Perez cited isomerization, reforming, hydrotreating, and hydrocracking as some of the many chemical and physical processing steps applied to petroleum to produce a variety of useful products, but said that they do not produce synthetic products. He argued that hydroisomerization does not create synthetic material because it does not create or build molecules, but merely rearranges the same molecules that were present in the original petroleum fraction.

Professor O.L. Chapman, an expert in synthetic chemistry from the University of California, also testified that synthetic materials are constructed from pure compounds that are themselves not natural and that the resulting synthetic material has well-defined properties. PAO and ester, he said, are built from pure small molecules that have already been subject to a chemical reaction, and are not built from natural petroleum.

Mobil also asserted that the definition of synthetic propounded by Castrol is contrary to the definition used by other motor oil manufacturers and the Environmental Protection Agency (EPA). Under the EPA's 40CFR435.11(x), "the term 'synthetic' material. . . means material produced by the reaction of a specific purified chemical feedstock, as opposed to the traditional base fluids such as diesel and mineral oil, which are derived from crude oil solely through physical separation processes."

The challenger also noted that Exxon, on its Web site, stated that a synthetic lubricant is a "lubricating fluid made by chemically reacting materials of a specific chemical composition to produce a compound with planned and predictable properties. . . ." Similarly, Mobil contended Chevron, Lubrizol, Mobil, Valvoline, and Quaker State all disseminated definitions of synthetic that did not include hydroisomerized oil.

The challenger argued that Castrol does not even meet the definition of synthetic oil that it disseminates on its own Web site. Castrol's definition reads, "synthetic lubricants are manufactured chemicals . . . created in the laboratory by combining molecules" and "a lubricant produced by synthesis rather than by extraction and refinement." Mobil asserted that, in fact, Syntec meets Castrol's own Web-posted definition of mineral oil: "oil that is manufactured from crude oil by a series of refinery processes."

Despite the fact that the label does not contain the claim that Syntec is a fully synthetic motor oil, Mobil contended that Castrol's television commercials, brochures, labels, Web sites have created an automatic association for consumers that any Syntec product is a synthetic oil. In response to Castrol's assertions that SAE changed its definition of synthetics to include mineral oils, Mobil asserted that SAE's legal administrator, Steven P. Daum, has stated, "SAE has neither issued an official definition of, nor adopted a Society position on, what does or does not constitute such materials. SAE does not render opinions on what products may be marketed or advertised as synthetic motor oil."

Furthermore, Mobil contested Castrol's claim that Section J357 of SAE's "Physical and Chemical Properties of Engine Oils," described the basestocks used in manufacturing motor oils, recognizes Shell's hydroisomerized basestocks as synthetic. The challenger claimed the section is a general guide to engine oil properties and that the current version does not define or even use the word "synthetic." Mobil also argued that Castrol's assertion that SAE's Automotive Lubricants Reference Book supports hydroisomerized oil as synthetic is misleading. Mobil contended the book expresses the views of the authors and not that of SAE.

Castrol's Definition
Castrol distinguished "synthetic" from "conventional" oil in its definition. Conventional oils, according to Castrol, are taken from the ground, purified, and refined without reforming through chemical reactions. Castrol described synthetic oils as made with stocks in which the molecular structure of a substance, such as wax, has been broken apart and transformed through a chemical reaction to create a new molecule that is different from naturally occurring substances.

Castrol called Nobel Laureate Roald Hoffman and Frank H.T. Rhodes, professor of chemistry at Cornell University, who defined synthetic material as "the product of an intended chemical reaction." Hoffman also defined at least one major chemical transformation (reaction) in its manufacture of processing, but a simple "physical separation, purification, or transformation (e.g., freezing or boiling) does not constitute a synthesis."

Sir John Meurig Thomas of the Royal Institute of Great Britain reached a similar conclusion, stating that although there is no net increase in the size of the molecule in hydroisomerization, this does not prevent the process from creating a synthetic substance. Furthermore, he noted the act of isomerizing a linear paraffin into a branched-chain paraffin makes the process of producing Shell's hydroisomerized basestock as much of a synthesis as the buildup of larger hydrocarbons from smaller ones.

J.G Helpinstill, who works for Exxon in basestock and finished-product research and development, stated that it is appropriate to classify as synthetic materials that are not found in the earth's naturally occurring resources in commercial quantities, but instead are made by substantive chemical modifications of other naturally occurring or physically recoverable substances.

In 1993, Castrol asserted SAE was asked to exclude hydroisomerized products from the definition of synthetic basestocks by defining synthesis as involving the buildup of larger molecules from smaller components. The SAE, according to Castrol, decided in 1995, as did the API, to revise its guidelines to eliminate any definition of synthetic. The advertiser contended Mobil's challenge before the NAD is really an effort to reopen a debate previously lost in these industry organizations. Furthermore, Castrol contended the SAE's Automotive Lubricants Reference Book states that base oils made through severe cracking and reforming processes may be marketed as synthetic.

Castrol also maintained that basestocks like shell's hydroisomerized basestock are marketed as synthetic in 37 countries, including the United States, and that Mobil's real interest is in protecting its market dominance. The advertiser argued that Mobil, through its alliance with British Petroleum, has also marketed hydroisomerized basestocks as synthetic in Europe and elsewhere.

In a private interview with Lubricants World, Castrol's legal counsel from Paul Weiss said, "As the NAD recognized, the scientific and industry consensus view is that synthetic basestocks are manufactured through an intended chemical reaction in which the molecular structure of a substance has been transformed. Synthetic basestocks are used to produce engine oils that meet high performance specifications." Furthermore, he contended the NAD's decision confirmed that the use of judiciously chosen synthetic basestocks is essential to the formulation of a fully synthetic engine oil that meets the exacting performance standards consumers have come to expect from synthetic engine oils.

He said, "The NAD recognized, therefore, that both composition and performance are important characteristics of synthetic lubricants. Castrol requires that its Syntec full-synthetic engine oils meet those exacting performance specifications and surpass the performance of conventional products."

Industry Reaction
In Lubricant World's discussions with several lubricant companies, the case raised a diversity of opinions.

An industry expert from a major oil company prefers a description of synthetic used by the Society of Tribologists and Lubrication Engineers (STLE), which defines synthetics as man-made compounds, not naturally occurring, and that combining low-molecular-weight materials via chemical reaction into higher-molecular-weight structures makes these products. The spokesperson said, "In our opinion, that responsibility [of placing the accountability of defining synthetics in the hands of manufacturers or lubricant marketers] will yield an inconsistent application of the basestock, and inconsistencies in finished-product quality will result."

He also argued that based on PAO synthetic products, the emphasis should be based on performance rather than composition. "This is not to imply," he suggested, "that the only way to achieve enhanced performance is through the use of PAO. In Europe, for example, oil is formulated on various quality tiers, where the consumer is informed about what each tier will accomplish in his automobile (extended drains, high-RPM engines, etc.). The North American lubricant market has a long way to go to develop this type of market."

Sztenderowicz, however, applies the definition in Webster's Dictionary in the chemical context. The dictionary defines synthetic to mean, "of, relating to, or produced by chemical or biochemical synthesis, especially produced artificially," with synthesis defined as "the production of substance by the union on chemical elements, groups, or simpler compounds or by the degradation of a complex compound."

Chevron Products Co. manufactures a VHVI line of unconventional base oils (UCBOs) at its Richmond base oil plant. Based on these definitions, Sztenderowicz said, "Both Chevron PAOs and UCBOs fit this description." He noted the definition clearly links synthetics to composition or origin, but not to a specific composition, origin, or manufacturing route. "We think that a basestock in which the molecules largely are altered in some way from those appearing in the raw materials might be classified as synthetic," Sztenderowicz explained. "Performance is an issue separate from whether or not the base fluid is considered synthetic. The association is based entirely upon marketing claims. In the real world, the performance of a lubricant is a function of both the base fluid and the additives which make up the product. Although most synthetic basestocks offer certain advantages relative to conventional stocks, superior performance is not guaranteed by their use."

Henkel Lubricant Technologies refers to the traditional definition described by ASTM D 4175 from the American Society for Testing and Materials. In this case, synthetic is defined as originating from the chemical synthesis of relatively pure organic compounds from one or more of a wide variety of raw materials. Henkel produces ester basestocks used in the manufacture of synthetic or synthesized lubricants, including polyolesters, diesters, and dimer acid esters. A spokesperson for the company said, "we feel the definition of synthetics should include a combination of performance and composition."

Motiva Enterprises LLC defines synthetics as "man-made, not naturally occurring." Motiva manufactures Group III base oils known as TEXHVI 3 and 4. A representative of the company said "The definition of synthetics should be based on how it is derived."

None of the independent manufacturers contacted by Lubricants World said they had heard of the case or judgment. Denny Madden of Amalie Oil Co., which buys and manufacturers finished goods using both PAOs and VHVI basestocks, said "Personally, I have always ad a strange feeling about calling one slice of crude oil synthetic when the very nature of refining is a synthesizing process. I understand that there needs to be a way of differentiating between basestock types and that more mechanical, physical, and chemical activity takes place when one makes PAOs and other so-called synthetic stocks, but all crude is synthesized to make any number of very different products, lubricating or otherwise. So, how do I feel about the subject? Confused!"

Outcome
Castrol North America Inc. has agreed to modify its superior engine protect and "unique molecular bonding" claims in advertising for its Syntec motor oils, but continues to advertise the product as a synthetic. Castrol says it is in the process of further upgrading and reformulating Syntec. Castrol's legal counsel added separately to Lubricants World, "The NAD's decision does not make any changes. Instead, it confirms a preexisting consensus reached by industry groups, experts, and scientists."

A Mobil spokesperson told Lubricants World that "Mobil is disappointed with the NAD's decision that, in its judgment, Castrol Syntec can be advertised and marketed as synthetic motor oil. Mobil filed the challenge in order to protect consumers and the integrity of fully synthetic motor oils. Mobil 1, the top-selling fully synthetic motor oil in the world, provides several important benefits not offered by conventional blended or hydroprocessed motor oils -- benefits that can significantly improve engine performance, even under extreme conditions." Mobil currently does not have any plans to appeal the ruling.

Industry experts had mixed reactions to the impact of the decision on developing an industry-accepted definition for synthetics. A Henkel spokesperson said, "If the technical societies adopt the broader definition of synthetics, it will force more performance-driven specifications in the market and the term 'synthetic' will become meaningless." One industry expert described, "The market will move in a direction that it has historically and support synthetics as they presently are defined. PAOs will continue to thrive and support the demands of niche markets that require the highest quality basestock available.

Joe Geagea, Chevron base oils products team manager, suggested, "Currently, there is no strict definition in North America of what constitutes synthetic, and we don't expect this to change. What we really think will come out of this decision is an awareness that several types of stocks, particularly some newer UCNOs, justifiably can be considered synthetic and are viable basestocks for the formulation of top-quality synthetic lubricants. In other words, the decision sends a message that 'synthetic' is not synonymous with 'PAO'".

Part 2

As reported in Part 1 of this story (October 1999 Lubricants World), the National Advertising Division (NAD) of the Council of Better Business Bureaus ruled in April 1999 that Castrol Syntec motor oil can be marketed as a synthetic. The decision followed a complaint filed by Mobil that as of December 1997, Castrol no longer used polyalphaolefins (PAOs) but hydroprocessed base oils to formulate the product. The decision is final, but the impact it might have on the lubricants industry could open the floodgates on how synthetics are marketed.

The PAO commercial market can be traced as far back as the early 1970s, when specialized products were formulated from PAOs. However, it was not until Mobil Oil commercially marketed its Mobil 1 products 25 years ago that PAOs became a major consumer-sought lubricant product.

Since that time, the PAO market has traveled a long and winding road, enjoying slow but steady growth while fending off criticisms of high cost compared to conventional oils. In the last 10 years, the PAO market took off significantly, first in Europe and then in North America, expecting as much as double-digit growth. In part, the growth might be attributed to the stricter specifications in Europe that created a market niche for synthetic and semi-synthetic products. The demand has since extended to North America and other continents.

It was the invention of the hydrockracking process in the late 1950s, followed by Chevron’s development of hydrodewaxing or hydroisomerizing in the late 1980s, that created the process for the development of the hydrorocessed market.

The 1990s brought a change to the hydrodewaxing technology, making large volumes of high-quality basestocks available at lower cost. Much of this capacity is used to produce Group II base oils. The introduction of Group III basestocks made solely through hydroprocessing in 1996 by Chevron, Petro-Canada, and a few other base oil companies created a second generation of very high viscosity index (VHVI) oils in terms of both quality and potential capacity—that is, high-performance basestocks had gone mainstream. These base oils, which cost more than the Group IIs yet less than PAOs, do not usa a solvent-refining process and some say they may have a much higher performance level than conventional oils, almost approaching that of PAOs.
Increased severity of lubricant specifications has been the driving force in both the need and availability of PAOs and VHVIs, but it is still too early to tell in which niche these types of basestocks fall in the marketplace. Nevertheless, the NAD ruling has raised several issues regarding the marketing and application of the word “synthetic” that arguably would resolve some of these discrepancies. In this second of out two-part series, Lubricants World posed the question of the market impact of the NAD decision to a sample of representatives from a variety of segments in the lubricants industry.

Impact on Individual Companies
When asked how the NAD decision might impact individual companies, the answers were as diverse as the products each company markets. Castrol, whose formulation of Syntec utilizing hydroisomerized base oils instead of PAOs initiated Mobil’s complaint, stated it is “gratified” by the outcome of the decision.

“Castrol is proud to be a major worldwide provider of synthetic formulated lubricants, and looks forward to continued participation in this exiting market,” said a company spokesperson. “Castrol is committed to upgrading its products and producing the highest quality synthetic engine oils. We will continue to explore ways to ensure that Syntec remains a leading performer in the synthetic category.”

Mark Pernik from Chevron Chemical said, “To this point, most lubricant manufacturers are taking a conservative approach to the decision and continue to use a PAO in their synthetic formulations. In fact, Mobil has already raised the quality bar by developing a new Mobil 1 Tri-Synthetic PAO formulation. For the past 5 years, Chevron Chemical has produced a new generation of PAOs that enhance performance for longer drain intervals. These products improve on important properties such as VI, oxidative stability, and volatility from traditionally available PAOs.

Joe C. Costa, manager of specialty/niche lubricants at Conoco Lubricants, said, “This decision will have a minimal impact on our company as we are poised to provide the optimum lubricants to meet our customers’ needs, regardless of the marketing definition of ‘synthetic base oil.’ Conoco has made a major decision to commit to heavily hydroprocessed/hydroisomerized basestocks. And yet, we also supply lubricants based on ‘chemically synthesized’ base oils, such as PAOs…We continue to provide a complete offering to our customers so that they always have the highest value product to meet their needs.”

Chevron, which produces both unconventional base oils (UCBOs) and PAOs, believes the impact on its market will depend on customers’ needs and preferences. Joe Geagea, manager of the Chevron Base Oils Products Team, argued, “overall, we expect significant growth in the UBCO segment at some short-term expense of the PAO segment, followed by growth of both segments in the long term.” Brent Lok, Chevron Base Oils Product Development manager, added, “In addition to the expected growth in UCBO sales, our finished-oils colleagues are looking at options for the use of UCBOs in Chevron’s synthetic product lines.”

Henkel, which produces ester basestocks used in the manufacturing of synthetic or synthesized lubricants, could see little impact on the company based on the NAD’s ruling. A Henkel spokesperson said, “Henkel’s products are performance driven and customer focused.”

Ed Newman of added, "AMSOIL has been the recognized leader in the development of synthetic motor oils, and we always strive to maintain the highest performance criteria for our products. For this reason, we do not foresee any negative impact because [our] customers tend to focus more on performance criteria rather than name tags.”

Valvoline’s official position regarding the decision was stated as follows: “Valvoline will not comment on rulings or decisions which impact our competitors. Our own product formulations are confidential for competitive reasons.”

Like many of the independent manufacturers Lubricants World surveyed, Amalie Oil Co., an independent blender and packager for motor oil companies that purchases and manufacturers finished goods using both PAOs and VHVIs, said it had not heard enough about the case to make a judgment. However, Denny Madden of Amalie described the decision as shocking and confusing for the market.

George Crow, president of Cross Oil Refining and Marketing Co., responded to the NAD decisions as follows: “Let’s start off with one very important premise, that motor oil is, after all, mainly a marketing-driven event. We are not talking [about] whether these oils meet the requirements for which they were blended; rather, we are talking about the attack on Mobil’s long-held dominance in the synthetic market. And they built this position around PAOs. If another product actually can give equal performance to PAOs, then Mobil is at a cost disadvantage. It will definitely affect Mobil, being a producer of PAOs…It will enhance the standing of the VHVI producers, which are becoming more numerous. In this case Petro-Canada, Chevron, Shell Europe, Exxon, Texaco, and soon Sun will be able to compete, economically, with Mobil. In the past, this was not the case.”

Crow continued, “Now, after saying all of this, and if Mobil is able to keep their brand image and advertising strong, they will be able to continue to maintain their number one position in synthetics. They may have to reduce their price on PAOs, or have to revert to using all or some VHVI material to economically compete. Or just not make as much money as their competitors will on the sale of a quart of synthetic product. I think this will make PAOs become more competitive with VHVIs and enhance the demand for VHVIs in the future. I think it is a good move for the industry, a good move for Castrol, and an unfortunate event for Mobil. For Cross Oil, it will not have an immediate impact at all. But down the road a bit, if we want to get into the finished-oil package business, it will allow Cross to make more money on the sale of synthetic or semi-synthetic products, assuming PAOs stay at a higher price than VHVIs.”

Impact on the Synthetic Base Oil Market
In the past 7 or 8 years, synthetics, in general, have seen increased activity. One brand that exemplifies this trend has been Castrol’s Syntec, whose market share in the last 5 years has climbed from virtually nothing to 20%. Nearly every major oil company currently has a synthetic product line. Based on this trend, the NAD decision has set a tone that may significantly impact the “synthetic” base oil market, specifically the supply and demand of PAOs and VHVIs.

A Castrol spokesperson assessed, “As the NAD’s decision reflects, synthetic engine oils formulated with high-quality hydroisomerized basestocks—like the basestock used in Castrol Syntec—clearly match the performance specifications of synthetic engine oils formulated with PAO basestocks. For that reason, such stocks have been, and will continue to be, competitive with PAO basestocks. Castrol believes that consumers will continue to benefit from that competition.”

An expert familiar with PAOs disagrees. He said, “The market is reading too much into the decision and trying to cast a broader net for other mineral oil basestocks. It is very important to note that Castrol’s claim was made for a very specific product from a very specific feedstock. Castrol argued that Shell’s XHVI from a slack wax stream is synthetic. The spokesperson indicated this is the part of the decision that has the largest potential impact. The quality of Group III products in inconsistent, and their physical properties are different from one manufacturer to the next. If these products were to be classified as synthetic, and suppliers use some of the poorer quality Group IIIs in the synthetic market, consumers will be misled and the high-margin niche that has been developed by present-day synthetics will erode.”

Costa of Conoco Lubricants suggested, “Presently, the supply and demand for PAOs as lubricant basestocks are generally in balance. Thus, a decision or ruling allowing the use of another (particularly less expensive) oil into the segment of the market now occupied by PAOs will obviously create a temporary softness in the PAO market.”

Lok of Chevron contended the jury is still out on the impact of the NAD’s decision. “Many of our customers are still studying this ruling and deciding what course of action to take. In the immediate future, high-performance Group III base oils will probably gain some volume at the expense of PAOs. But the enhanced competition can very likely expand the total size of the synthetic market, allowing for continued growth of both PAO and Group III UCBOs.” Lok said he believes the PAO market will always be a niche market because of the limited availability of PAO feedstocks.

“The availability of new fully hydroprocessed Group III base oils, whose capacities are measured in thousands of barrels per day, will allow manufacturers to specify high performance in mainstream applications,” said Lok. He further suggested, “We think that this development can further increase the already healthy growth rate of the synthetic market, to the point that both PAO and Group III UCBOs can co-exist in the market place.”
A Henkel spokesperson said, “We believe that the market would begin to differentiate products by performance rather than by a definition that may have been ompromised.”

Newman of AMSOIL suggested, “We’re concerned about the message to consumers. The NAD decision will result in increased confusion in the marketplace among consumers. Even the experts aren’t entirely in agreement on this matter. If a Group III basestock is acceptable as ‘synthetic,’ it helps all Group III products and weakens the meaning of the word ‘synthetic.’ Not all Group III lubricants are created equal.” He added, “True synthetics will continue to offer significant performance advantages, including high- and low-temperature performance under extreme conditions, oxidative stability, and lower volatility, to name a few.”

What’s Ahead?
The synthetic market faces many challenges other than those directly related to the NAD ruling. Consolidations, mergers, and acquisitions are changing the key players in the industry. Driven by demand and increasing specification hurdles, both base oil manufacturers and aftermarket formulators may have to address the performance, composition and supply of synthetics. Economics will also play an important role in driving the market.

However, these factors are all uncertain. What is certain is that “synthetics,” a component of higher performance, will remain a strong presence in the marketplace. At its current precarious state, any ruling -- whether it is through the court system or the NAD – may tip the scales in determining the outgrowth and market of synthetics, whether they are PAOs or hydroisomerized basestocks.

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