Motorcycle Oil vs Car Oil: What's the Difference?

The Breakdown

Motorcycle and car oils share similarities, but differ in crucial ways. Motorcycle oils are formulated to withstand the higher temperatures and loads experienced in motorcycle engines, which typically run at higher RPMs and produce more heat than car engines.

Viscosity and Friction Reduction

Car oils prioritize friction reduction for fuel efficiency, while motorcycle oils balance friction reduction with protection. Motorcycle engines require a higher viscosity oil to maintain a thicker film between moving parts and prevent metal-on-metal contact.

Additives

Motorcycle oils contain specific additives that cater to the unique needs of motorcycle engines. These additives include anti-wear agents, detergents, and shear resistance stabilizers, which help protect against wear, reduce sludge formation, and maintain oil viscosity under extreme conditions.

Shear Stability

Motorcycle oils must resist shear forces, which can break down the oil and reduce its effectiveness. Motorcycle engines experience higher shear forces due to the transmission's meshing gears, which can compromise the oil's protective properties over time.