Manufacturer Installs Only AMSOIL

A California manufacturer of steering and suspension parts installs AMSOIL synthetic greases exclusively in its Diamond Series specialty parts. RARE PARTS INC. of Stockton, Calif. was the vision of Lyle Burgess, who began operating a wheel alignment service in 1957. […]

AMSOIL Signature Series Synthetic Motor Oil Outperforms Competition In New Study

Nine synthetic motor oils were compared to AMSOIL Signature Series 5W-30 Synthetic Motor Oil (ASL). When it was all said and done, Signature Series demonstrated the best overall performance and cost-effectiveness. Since AMSOIL introduced the first synthetic motor oil to […]

Ride Hard, Run Cool, It’s Not Just A Slogan

Protection against extreme heat is of the utmost importance in motorcycle applications. The air-cooled V-twin engines used in Harley-Davidson motorcycles can get extremely hot, particularly when idling or traveling at low speeds. If a motorcycle oil cannot withstand hot operating […]


Original Equipment Manufacturers (OEM) often suggest in owner’s manuals, advertisements or through dealership personnel that enthusiasts must use the OEM-branded oil to comply with the new vehicle or equipment warranty. Some OEM’s include warnings of catastrophic engine failure should anon-OEM […]

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 […]

AmsOil Synthetic Motorcycle Oil Demonstrates Outstanding Protection In Extreme Heat

To demonstrate its extreme-heat protection qualities, AMSOIL 20W-50 Synthetic Motorcycle Oil (MCV) was subjected to a dynamometer test designed to simulate conditions even more extreme than the demanding stop-and-go driving conditions of a motorcycle rally or parade route. A 2012 […]

Oil Additives Can Offset the Careful Balance of a Well-Formulated Motor Oil

An overabundance of anti-wear agents, for example, can lead to reduced resistance to corrosion. One of these things is engine oil additives. The auto shops shelves are groaning under the weight of engine oil additives. It seems almost any internal […]

Two-and Four-Stroke Engine Lubrication Needs

Two-stroke and four-stroke engines are designed differently and operate under different conditions, requiring different lubrication methods. Internal combustion engines are used to produce mechanical power from the chemical energy contained in hydrocarbon fuels. The power-producing part of the engine’s operating […]

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