Importance

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Abstract

The present disclosure relates to engine lubricating oil compositions and methods of lubricating a diesel internal combustion engine effective to achieve robust performance in both durability (i.e., piston cleanliness) and improved fuel economy. In one aspect, the engine lubricating oil compositions herein have a composition effective to achieve passing piston cleanliness pursuant to CEC L-117-20 (i.e., the VW TDi3 test) and to achieve a positive fuel economy increase as measured pursuant to JASO M 366, and preferably a fuel economy improvement as measured pursuant to JASO M 366 of at least about 0.5 percent. The engine lubricating oil compositions herein may have a viscosity grade of 0W-8, 0W-12, 0W16, and/or 0W-20.

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First Claim