Amsoil Synthetic 10W-40 and 20W-50 Motorcycle Oils

Specially formulated and recommended for all four-cycle motorcycle engines, AMSOIL High Performance Synthetic Motorcycle Oils provide unbeatable lubricating protection in the most demanding operations.

Wear Protection

AMSOIL Synthetic Motorcycle Oils are formulated with high levels of zinc and phosphorus for superior protection of cam lobes and other high pressure components. According to the ASTM D4172 Four-Ball Wear Test, AMSOIL Motorcycle Oils leave a wear scar up to 36 percent smaller than those left by competing oils.

No Friction Modifiers

AMSOIL Motorcycle Oils contain no friction modifiers, ensuring dependable starting, smooth running, improved fuel efficiency and wet clutch compatibility. 

Longer Service Life

AMSOIL Motorcycle Oils contain a robust dispersant/detergent additive package, providing the ultimate protection and performance for longer intervals.

Superior Performance in Temperature Extremes

AMSOIL Motorcycle Oils provide outstanding low temperature fluidity, ensuring easy cranking, dependable starts and fast poststartup protection. In high temperature operation, AMSOIL Motorcycle Oils resist thermal degradation and oxidation at higher temperatures than other motorcycle oils, ensuring clean and dependable performance. Engines run cooler on hot days.