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US 7,678,747 B2Granted
Engine oil compositions
AssigneeCherron Oronite Company LLC
InventorsStephen H. Roby, Susanne G. Ruelas
Life of this patent
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Abstract
A lubricating oil composition comprising (a) a major amount of a base oil of lubricating viscosity and (b) a minor deposit-inhibiting effective amount of a reaction product prepared by transesterifying at least one glycerol ester and at least one non-glycerol polyol ester is provided. Methods for its use are also provided.
Claims22
A lubricating oil composition comprising (a) a major amount of a base oil of lubricating viscosity selected from the group consisting of Group II, III and IV basestocks, and mixtures thereof;
- and (b) about 0.05 to about 10 wt. %, based on the total weight of the composition, of a reaction product prepared by transesterifying at least one glycerol ester and at least one non-glycerol polyol ester, wherein the composition has a phosphorous content not exceeding 0.08 wt. % and a sulfur content not exceeding 0.2 wt. %, based on the total weight of the composition.
Dependencies are inferred from the claim text.