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Motor Oil Test and Comparison

AMSOIL vs. Mobil 1

409,000-Miles Without An Oil Change

AMSOIL Excels in API Sequence IIIF Performance Test

Motor Oil Performance Tests & Comparisons

Temperature Extremes Call For Superior Motor Oils

Why Harley-Davidson Owners Choose AMSOIL

Synthetic Motorcycle Oil & Harley-Davidson Warranty Issues

AMSOIL Synthetic Gear Lube Outperforms Valvoline Gear Lube

8.2% More MPG With AMSOIL Synthetic Lubricants

AMSOIL Proves Superior In Clark County Field Test

AMSOIL Series 3000 Synthetic 5W-30 Heavy Duty Diesel Oil is Correct Choice for Jeff Foster Trucking

AMSOIL Products Improve Efficiency and Reduce Operating Costs for Gerlach Trucking

What is the Noack Volatility Test?

What is the Four-Ball Wear Test?

What is TBN?


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Hayes Diversified Technologies

AMSOIL sponsored Driver Attempts World Speed Record

The Bonneville Salt Flats International Speedway in Tooele County, Utah, hosts the fastest vehicles in the world every year as people from all walks of life attempt record-setting speed in various motorized vehicles. This year (2007) AMSOIL was represented by Fred Hayes on his HDT USA diesel motorcycles.

HDT USA/Fred Haynes
Fred Hayes currently holds eight world and four national land speed records on motorcycles. At the Salt Flats, he attempted to better those records and add another - all on diesel-powered bikes.

Fred Hayes
Hayes is an experienced motorcycle rider, earning top honors in several American motorcycle riding competitions through the years. In 2003, Hayes was awarded a platinum medal at the UK National Rally, the competition's highest award. Since then Hayes has ridden two HDT USA diesel motorcycles to the first recognized land speed records for diesel motorcycles.

Hayes' experience with motorcycles goes far beyond competition, though. He has been with Hayes Diversified Technologies (HDT USA) since the company's beginning in 1961 and has led the company to become the largest supplier of military motorcycles to the U.S. Defense Department. Hayes is HDT's President, CEO and Chief Engineer. In addition, Hayes was a primary consultant to the Motorcycle Safety Foundation and the U.S. Marine Corps during the development of the Marine Corps' Military Motorcycle Operator Training Course and still holds credentials as a Military Motorcycle Chief Instructor. In short, Hayes knows motorcycles. He builds them and rides them, and does both in a superior fashion.

Hayed Diversified Technologies
HDT USA develops and manufactures motorcycles for the U.S. Defense Department. The company is known for its advanced technology, superior engineering and revolutionary motorcycle design, but HDT began as something totally different. Throughout the 1960s and 1970s, HDT specialized in the development and manufacture of electro-mechanical switches and relays for defense and aerospace. The company was the original equipment manufacturer (OEM) for major defense companies like Lockheed, Boeing, Control Data and Unisys. In 1970, HDT expanded into commercial motorcycle sales, selling and racing PENTON Sport Cycles under the trade name METTCO. From 1976 through 1979, HDT was employed as a consulting firm to Honda's off-road racing and enduro teams. HDT produced suspension components and provided two-stroke engine performance modifications for Honda from 1977 through 1979.

In 1981, HDT used its unique combination of expertise in government contracting and off-road motorcycle development to place a winning bid to produce tactical military motorcycles for the U. S. Army. Since then, HDT USA has been awarded more than 45 contracts, resulting in over 2500 military motorcycles being delivered to the U.S. and allied military forces. HDT's M1030B1 Marine Corps motorcycle is known as the best performing, most reliable tactical military motorcycle now in service with any military organization, beating out competitive motorcycles from BMW and KTM.

"Single Battlefield Fuel"
In 1984, all NATO military forces adopted a long term goal of employing a single battlefield fuel to reduce the logistics burden of supplying gasoline, diesel, aviation gasoline and aviation kerosene. Years later, the U.S. Navy announced they would not supply or transport gasoline in any form, only heavy fuels such as diesel and jet fuel. The only equipment still operating on gas was small field generator sets and motorcycles. The military approached several motorcycle manufacturers to determine what options were available as alternatives to gas powered bikes. All of these manufactures claimed that a diesel fueled motorcycle was neither commercially practical, cost effective, nor, in some cases, even possible given the performance requirements. After requesting proposals from all interested sources, the U.S. Marine Corps found the answer at HDT USA. In May 2001, HDT unveiled the first motorcycle powered by a diesel engine that was designed specifically for motorcycles.

The Search for a More Durable Oil
Because HDT motorcycles are made for the military, their engines and the oil that protects them must withstand much more rigorous testing and use than the average bike. "The military does not perform a civilian-type break-in; that's not how they use their vehicles," said Hayes. These motorcycles are operated in every kind of severe condition imaginable, from the ice and cold mountainous regions to the sand and heat of the Iraqi desert. They run hard, and breaking down in the heat of battle should be the last thing on a soldier's mind. These severe conditions dictate that the oil be able to flow readily in sub-zero temperatures to quickly lubricate moving parts, yet stay viscous enough to cool and protect in extreme heat.

HDT was servicing their motorcycles with Mobil Delvac 1 5W-40 and using Mobil 0W-30 racing oil for their race engines. Mobil's 0W-30 is not diesel rated or recommended for motorcycle wet clutch applications. "We have seen for several years that our engines 'like' the lighter oils, especially during initial run-in," said Hayes. "This has been especially evident when we look at camshaft and rod bearings after a new engine has bee run very hard with no run-in," HDT has been using Mobil 1 for three years, finding it was superior to conventional diesel oil, but they were having problems with blow-by.

Impressive Results
Hayes said HDT was drawn to AMSOIL because of the availability of AMSOIL 0W-20 Synthetic Motor Oil and Synthetic 5W-30 Heavy Duty Diesel Oil. "We noticed an increase in horsepower right away as compared to Delvac 1," said Hayes. "But what was quite surprising was the condition of an engine after a 50-mile run-in and over 120 full throttle dyno runs. The camshaft bearings, the small and large end rod bearings didn't even look like they had been run. During that series of dyno runs, we registered the highest horsepower and torque readings ever." Hayes said their testing proved that AMSOIL Synthetic 5W-30 Heavy Duty Diesel Oil provided better cam bearing lubrication, better transmission operation and less blow-by than their previous oil. "We picked up just over one horsepower at the rear wheel," he said. "In addition, it appears that overall coolant temperature was down about five degrees."

Hayes said AMSOIL provides superior performance in the two areas that matter to him most: horsepower and lubrication, especially in new engines. At start-up, the exhaust cams are the last components the oil reaches. Because the military doesn't break in their vehicles like civilians do, and they typically don't have time to allow a warm-up period, it is vital that the engine oil is able to flow immediately. For this reason, HDT takes their engines straight to the dyno with no break-in, and they run wide open.

"The lubrication to the exhaust cams was really good," said Hayes. "They looked beautiful."

Commercially Available Motorcycles
HDT USA is working on development of commercially available motorcycles, tentatively scheduled for release by early 2008. The company is so impressed with AMSOIL that these motorcycles will come factory-filled with AMSOIL synthetic lubricants. This quote from HDT's website sums up their experience with AMSOIL: "With over a year of testing, we have found that AMSOIL products continually outperform all other lubricants. AMSOIL provides improved performance, increased fuel economy, lower oil consumption and significantly reduced engine wear in all operating conditions."

Bonneville Results
The weather did not cooperate with Hayes and his attempt to set new records, but eventually he was able to set two new national and international records. In the 750 MPS-D class (modified partial streamlining, diesel powered, 750 max. displacement) Hayes set a new record of 103.3215 mph. The old record was 101.617 mph. Hayes also set a new record in the MPS-DB 750 class (modified partial streamlining, diesel-powered, 750 max. displacement) of 110.4325, easily beating the old 105.147 record. All records are certified official by the American Motorcyclist Association (AMA). Unfortunately, due to the inclement weather and repeated track delays, they were unable to make all the runs necessary to set any other records.

Harley Davidson Owners Choose AMSOIL

Why is AMSOIL Synthetic Oil Better?

Watch this Informative Video

AMSOIL V-Twin Motorcycle Oil Torture Test

What You Need To Know About Motorcycle Oils

As with any vehicle equipped with an internal combustion engine, proper lubrication is essential to insure performance and longevity. It is important to point out that not all internal combustion engines are similarly designed or exposed to the same types of operation. These variations in design and operation place different demands on engine oils. Specifically, the demands placed on motorcycle engine oils are more severe than those placed on automotive engine oils. Therefore, the performance requirements of motorcycle oils are more demanding as well.

Though the degree may be debatable, few will disagree that a difference exists between automotive and motorcycle applications. In which area these differences are and to what degree they alter lubrication requirements are not clear to most motorcycle operators. By comparing some basic equipment information, one can better understand the differences that exist.

There are six primary differences between motorcycle and automotive engine applications:

Operational Speed - Motorcycles tend to operate at engine speeds significantly higher than automobiles. This places additional stress on engine components, increasing the need for wear protection. It also subjects lubricating oils to higher loading and shear forces. Elevated operating RPMs also promote foaming, which can reduce an oil's load-carrying ability and accelerated oxidation.

Compression Ratio - Motorcycles tend to operate with higher engine compression ratios than automobiles. Higher compression ratios place additional stress on engine components and increase engine operating temperatures. Higher demands are placed on the oil to reduce wear. Elevated operating temperatures also promote thermal degradation of the oil, reducing its life expectancy and increasing the formation of internal engine deposits.

Horsepower/Displacement Density - Motorcycle engines produce nearly twice the horsepower per cubic inch of displacement of automobile engines. This exposes the lubricating oil to higher temperatures and stress.

Variable Engine Cooling - In general, automotive applications usa a sophisticated water-cooling system to control engine operating temperatures. Similar systems can be found in motorcycle applications, but other designs also exist. Many motorcycles are air-cooled or use a combination air/oil design. Though effective, they result in greater fluctuations in operating temperatures, particularly when motorcycle are operated in stop-and-go traffic. Elevated operating temperature promotes oxidation and causes oils to thin, reducing their load carrying ability.

Multiple Lubrication Functionality - In automotive applications, engine oils are required to lubricate only the engine. Other automotive assemblies, such as transmissions, have seperate fluid reservoirs that contain a lubricant designed specifically for that component. The requirements of that fluid differ significantly from those of automotive engine oil. Many motorcycles have a common sump supplying oil to both the engine and transmission. In such cases, the oil is required to meet the needs of both the engine and transmission gears. Many motorcycles also incorporate a frictional clutch within the transmission that uses the same oil.

Inactivity - Motorcycles are typically used less frequently than automobiles. Whereas automobiles are used on a daily basis, motorcycle use is usually periodic and in many cases seasonal. These extended periods of inactivity place additional stress on motorcycle oils. In these circumstances, rust and acid corrosion protection are of critical concern.

It is apparent that motorcycle applications place a different set of requirements on lubricating oils. Motorcycle oils, therefore, must be formulated to address this unique set of high stress conditions.

Erik Buell Partners With AMSOIL

AMSOIL Synthetic Motorcycle Oil is the Factory Fill Oil for EBR Buell Motorcycles

AMSOIL Synthetic Dirt Bile Oil Maximizes Performance

Consistent Clutch Feel - Clutch slippage or inconsistent clutch feel can prevent dirt bike riders from riding as fast or effectively as they like. To keep the engine within the power band, riders often modulate the clutch, increasing the opportunity for clutch slippage if low-quality lubricants are used.

AMSOIL Synthetic Dirt Bike Oil's superior friction-durability properties help minimize clutch slippage, fade and chatter, giving riders consistent clutch feel during takeoffs or when maneuvering around obstacles on the trail. In an extreme simulated-start test, AMSOIL Synthetic Dirt Bike Oil continued to deliver consistent clutch feel following 32 simulated race starts, while a leading original equipment manufacturer (OEM)-branded oil demonstrated inconsistent clutch-lever action and poor clutch feel after 16 starts. The clutch plates lubricated with AMSOIL Synthetic Dirt Bike Oil remained clean and in good overall condition, while the plates using the OEM oil revealed discoloration and wear. AMSOIL Synthetic Dirt Bike Oil's superior performance helps instill in riders the confidence that their bikes will perform consistently in all types of riding conditions.

Racing is Research - AMSOIL corporately sponsored supercross and motocross racers identified consistent clutch feel as a key performance attribute. At the time, there was no dirt-bike-specific oil on the market that provided the level of clutch consistency professional and amateur riders demand. Consistent clutch feel is critical to motocross riders during starts to keep the bike from lurching forward prior to the gate dropping. Trail riders, meanwhile, need consistent clutch feel to confidently navigate obstacles without having to shift gears and lose momentum.

In-Depth Product Development - The process to develop Synthetic Dirt Bike Oil relied on a combination of lab and track testing. Clutch feel is inherently subjective, which creates challenges in designing a lubricant that delivers consistent clutch feel. To overcome that challenge, AMSOIL designed The Extreme Simulated-Start Test on Dirt Bikes. The test allows AMSOIL engineers to apply accelerated stress to a dirt bike's clutch in order to monitor clutch feel produced by a candidate lubricant.

The test uses a 2014 Honda CRF450R attached to a dyno. While in second gear, the test administrator holds the clutch at the point just prior to engagement, similar to the way a rider would hold the bike in the gates during a race start. The clutch is then released and the bike is run to fourth gear, simulating the time from the drop of the gate to the first corner in a race. The rear wheel is not allowed to slip during the test, placing additional stress on the clutch. Test administrators look for consistent lever action and feel as they wait to let out the clutch and as they shift the bike through the gears.

AMSOIL Synthetic Dirt Bike Oil was also subjected to extensive on-track testing in the bikes of GEICO/AMSOIL/Honda Factory Connection and other professional riders. A combination of rider feedback and lab testing resulted in the final formulation of Synthetic Dirt Bike Oil. Its performance in lab and track testing dispels the myth that synthetics are "too slippery" and make clutches slip. Results also demonstrate that AMSOIL Synthetic Dirt Bike Oil delivers consistent clutch performance while helping extend clutch life. (Buy Online)

AMSOIL Synthetic Dirt Bike Oil Clutch Plate Comparison

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NOACK Volatility Test is a Critical Measurement of Motor Oil Quality

AMSOIL was the first motor oil company in North America to use the NOACK volatility test to measure motor oil quality and performance. Although competing motor oil companies initially paid no attention to NOACK results, the test has since become a critical measurement tool throughout the industry.

Modern engine designs generate more heat than ever, accentuating the importance of the NOACK volatility test for determining an oil's ability to provide an adequate level of protection and performance. More horsepower, turbo chargers and aerodynamic styling have created extremely hot environments that receive less cooling from outside air, and high heat leads to oil oxidation, deposits and thickening in conventional oils.

Top quality for the current API SM motor oils specification, gasoline motor oils cannot experience a weight loss of more than 15 percent in the NOACK test. AMSOIL Synthetic Motor Oils were exceeding modern requirements over 20 years ago, while many current motor oils still have a hard time meeting this minimal requirement, increasing wear, fuel consumption and emissions.

As seen in the graph, AMSOIL Synthetic Motor Oil easily passes the NOACK Test and falls well below the the maximum 15 percent volatilization (burn off) rate dictated by the API SM motor oil specification, while the Royal Purple volatilization (burn off) rate is over 11 percent and the Lucas Oil FAILS the test with a volatilization (burn off) rate of over 40 percent. (read more)

NOACK Volatility Test AMSOIL vs Royal Purple vs Lucas Oil

MY AMSOIL Harley Davidson With Over 50,000 AMSOIL Miles

AMSOIL Dealer Michael Mathe's
2006 Harley-Davidson Sportster XL1200L with over 50,000 AMSOIL miles!

BMW R1200RT Protected by AMSOIL Synthetic Lubricants

AMSOIL Dealer Michael Mathe
Riding my AMSOIL protected 2012 BMW R1200RT on
"The Snake", Tennessee Hwy 421.
489 Curves in 12 Miles!

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.

"AMSOIL INC. warrants that the use of its lubricants will not cause mechanical damage to any mechanically sound equipment when AMSOIL INC. products are used in full compliance with the company's recommendations and instructions."


AMSOIL synthetic motor oils are formulated to surpass engine test specifications, offering protection far greater than competing motor oils for extended drain intervals. Most synthetic oil manufacturers make no claim to extended drain intervals, deferring to the maintenance schedule provided by the vehicle manufacturer. With its unparalleled oil and warranty program, AMSOIL offers consumers unprecedented protection and economics.

Another AMSOIL First

More than 20 years ago, AMSOIL began using the NOACK volatility test as a comparison tool and measurement of quality. Back then, nearly every oil tested side-by-side with AMSOIL synthetic motor oils failed, and those that passed barely squeaked by. Other oil companies paid no attention to NOACK results until Ford Motor Company made it a requirement for service fill oils, validating what AMSOIL had said all along.

THE NOACK Volatility Test
The NOACK Volatility Test determines the evaporation loss of lubricants in high temperature service. The more motor oils vaporize, the thicker and heavier they become, contributing to poor circulation, reduced fuel economy and increased oil consumption, wear and emissions. AMSOIL Synthetic Motor Oil resists high temperature volatization better than other motor oils. AMSOIL Synthetic Motor Oil maintains peak fuel efficiency and reduces oil consumption and emissions.

AMSOIL Now An ISO Certified Manufacturer
AMSOIL recently received ISO 9001:2000 certification of our Quality Management System (QMS). NSF International Strategic Registrations is the registrar that has verified our QMS meets the requirements of the ISO 9001:2000 standard, the most widely utilized quality standard throughout the world for quality management systems. ISO standards are used by over 300,000 companies worldwide setting rigorous standards for businesses, government and industry.

ISO 9001:2000 is applicable to any manufacturing and service organization providing a framework for system development that focuses on the customer, quality system performance and ongoing improvement. AMSOIL received ISO 9001:2000 registration under the scope: synthetic lubricants blending, packaging, and other fulfillment directly associated with lubricant product.

The ISO certification puts AMSOIL in line with some of the most efficient companies in the world. It is further assurance that the products and services AMSOIL provides will continue to maintain the high level of quality the company always demanded.

AMSOIL Product Information

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Which AMSOIL Products Are Recommended For Your Car or Truck?
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What Drain Interval Does AMSOIL Recommended For Your Vehicle?
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