Browse Publications Technical Papers 2003-01-1956

Effect of Engine Oil Additives on Motorcycle Clutch System 2003-01-1956

The energy conserving by engine oils has been required from the viewpoint of the environmental issue. The fuel efficiency of passenger car engine oils has been improved by adding friction modifiers. However, engine oils containing friction modifiers can not be applied to 4-stroke motorcycles. Because motorcycles normally have a wet clutch system inside the crankcase and such engine oils can decrease the clutch capacity.1)2) Therefore, it is important for motorcycle engines to investigate additives, which can increase friction coefficient on paper-based friction materials.
In this study, friction coefficients of engine oils formulated with different additives such as dispersants and detergents were evaluated with a reciprocating friction tester. Several types of polybutenyl succinimides, sulfonates, phenates and salicylates were used as dispersants and detergents.
As a result, it was found that the polybutenyl succinimide borate shows a higher friction coefficient than the other succinimide. In addition, several detergents, which increase a friction coefficient, were found.
No Caption Available


Subscribers can view annotate, and download all of SAE's content. Learn More »

Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Development of Specially Formulated 4-Stroke Engine Oil for Motorcycles


View Details


Fuel Saving Four-Stroke Engine Oil for Motorcycles


View Details


Study of Lower Viscosity Motorcycle Engine Oils for Fuel Saving-Anti-fatigue Performance-


View Details