Lubricating oil composition
OwnerFumio Gotou, Eiji Nagatomiinventors
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Abstract
A lubricating oil composition, particularly useful for use in gasoline engines, which has superior low fuel consumption properties is provided. A lubricating oil composition contains one or more salicylate-type detergents, one or more ashless friction modifiers and a base oil containing a base oil component having an oil film thickness of 95 nm or less, when measured under conditions of a sliding speed of 4.4 m/s, a Hertz pressure of 0.53 GPa and an oil temperature of 100° C.
Claims20
A lubricating oil composition comprising at least one salicylate-type detergent, at least one ashless friction modifier and a base oil, wherein the base oil comprises a base oil component having an oil film thickness of 95 nm or less, when measured under conditions of a sliding speed of 4.4 m/s, a Hertz pressure of 0.53 GPa and an oil temperature of 100° C.
A lubricating composition comprising:
- (a) a base oil comprising 5% or more by mass, based on the entire base oil, of a base oil component having an oil film thickness of 80 nm or less, when measured under conditions of a sliding speed of 4.4 m/s, a Hertz pressure of 0.53 GPa and an oil temperature of 100° C.
- (b) from 0.5 to 10.0% by mass, based on the total mass of the lubricating oil composition, of a salicylate-type detergent;
- and
- (c) from 0.01 to 5% by mass, based on the total mass of the lubricating oil composition, of an ashless friction modifier that contains an oleyl group.
Dependencies are inferred from the claim text.