Patent ID: 6992049

Claim:
A lubricating oil composition comprising: (a) an oil of lubricating viscosity selected from the group consisting of Group II base stock, Group III base stock, Group IV base stock, and wax isomerates, and mixtures thereof; and (b) a lubricant additive in an amount of about 3% to about 40% of the weight of the lubricating oil composition, the additive comprising: (i) an alkylated naphthalene which contains at least about 5% of its weight from the naphthenoid moiety and having a viscosity of about 3 to about 50 cSt at 100%: (iii) an olefinic oligomer of about 2,000 to 20,000 number average molecular weight and having a viscosity of about 100 to 3,000 cSt at 100° C.; and wherein the weight ratio of component (i) to (ii) is from 1.5:1 to about 10:1.