See what happens when we push a Harley-Davidson* to more than 500°F.

What is synthetic motor oil? AMSOIL synthetic lubricants are chemically engineered to form pure lubricants. They contain no contaminants or molecules that don’t serve a designed purpose. Their versatility and pure, uniform molecular structures impart properties that provide better friction-reduction, optimum fuel efficiency, maximum film strength and extreme-temperature performance conventional lubricants just can’t touch.

Conventional lubricants, on the other hand, are refined from crude oil. Contaminating elements such as sulfur, nitrogen, oxygen and metal components such as nickel or vanadium are inherent to crude oil and cannot be completely removed through the refining process. The oil refining process separates the various types of molecules in the oil by weight, leaving molecules similar in weight but dissimilar in structure, reducing performance

Longer Lasting Oil

Find out how AMSOIL synthetic lubricants can save you money and time by lasting longer than conventional oils.

Synthetic vs. Conventional

Only a microscopic film of oil separates metal surfaces in your engine from touching and causing wear. AMSOIL synthetic motor oils form a more durable fluid film than conventional oils due to their resilient base oils. They reduce wear and help you maximize engine life.

Longer-Lasting Engines

Engine Protection

Save Money

Find out how AMSOIL synthetic lubricants save you money by maximizing fuel economy and reducing oil consumption.

AMSOIL shields your automobile with 75% more engine protection against horsepower loss and wear than required by a leading industry standard*, extending the life of vital components like pistons and cams.

*As required by a leading industry standard. Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by API SN specification.

Protect Against Heat