Lubricant composition
AssigneeExxon Research & Engineering Co.
InventorsHarold Shaub, Walter E. Waddey
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Abstract
A storage stable lubricating composition having improved anti-friction and anti-wear properties is provided by a base oil composition containing an additive combination of (1) a zinc dihydrocarbyl dithiophosphate, (2) an ester of a polycarboxylic acid and a glycol and (3) an ashless dispersant containing a high molecular weight aliphatic hydrocarbon oil solubilizing group attached thereto and wherein either the zinc or ester component or both are predispersed prior to adding them to the lubricating composition.
Claims19
A storage stable lubricating oil composition comprising a major portion of lubricating oil, from about 0.01 to about 5.0 parts by weight of zinc dihydrocarbyl dithiophosphate, from about 0.01 to about 1.0 parts by weight of an ester of a polycarboxylic acid with a glycol and from about 0.1 to about 30 parts by weight of an ashless dispersant containing a high molecular weight aliphatic hydrocarbon oil solubilizing group attached thereto, all weights based on 100 parts by weight of said lubricating oil.
Dependencies are inferred from the claim text.