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Gasoline Engine Oil Durability on Fuel Economy Improvement Performance
Technical Paper
958133
Sector:
Event:
JSAE Spring Conference
Language:
Japanese
Abstract
Fuel economy improvement of engine oil can be achieved by lowering oil viscosity and formulating friction modifiers. This improvement is measured with ASTM Seq. VI test under a short mileage accumulation condition. However, the accumulation in Seq. VI may be too short to know oil durability on fuel economy improvement up to oil drain in cars. The improvement may be lowered in cars. Authors studied the fuel economy durability with vehicle tests measuring viscosity and friction coefficient changes of used oils and determining the amount of friction modifier (MoDTC) remained in used oils.