Lubricating oil compositions
AssigneeChevron Oronite Company LLC
InventorsClaire Chommeloux, Alexander Boffa
Life of this patent
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Abstract
Disclosed is a lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity having a kinematic viscosity at 100° C. in a range of about 2 to about 50 mm2/s; (b) a hydrocarbyl succinimide dispersant; (c) a borated hydrocarbyl succinimide dispersant; and (d) a hydrocarbyl succinimide post-treated with a post-treating agent selected from the group consisting of an organic carbonate, an epoxide, a lactone, a hydroxyaliphatic carboxylic acid, and combinations thereof.
Claims20
A lubricating oil composition comprising:
- (a) a major amount of an oil of lubricating viscosity having a kinematic viscosity at 100° C. in a range of about 2 to about 50 mm2/s;
- (b) a non-borated hydrocarbyl succinimide dispersant;
- (c) a borated hydrocarbyl succinimide dispersant;
- and
- (d) a hydrocarbyl succinimide post-treated with a post-treating agent selected from the group consisting of an organic carbonate, an epoxide, a lactone, a hydroxyaliphatic carboxylic acid, and combinations thereof.
A method comprising operating an internal combustion engine with a lubricating oil composition comprising
- (a) a major amount of an oil of lubricating viscosity having a kinematic viscosity at 100° C. in a range of about 2 to about 50 mm2/s;
- (b) a non-borated hydrocarbyl succinimide dispersant;
- (c) a borated hydrocarbyl succinimide dispersant;
- and
- (d) a hydrocarbyl succinimide post-treated with a post-treating agent selected from the group consisting of an organic carbonate, an epoxide, a lactone, a hydroxyaliphatic carboxylic acid, and combinations thereof.
Dependencies are inferred from the claim text.