Patent ID: 8153566

Claim:
A lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity selected from the group consisting of Group I, II, III and IV basestocks, and mixtures thereof, and (b) an oil-soluble tetra-functional hydrolyzable silane compound of formula I or a hydrolysis product thereof: wherein a is an integer from 1 to 4 and each R is independently a C 1 to C 6 alkoxy group, C 6 to C 20 aryloxy group, C 6 to C 20 alkylaryloxy group, C 6 to C 20 arylalkyloxy group, C 6 to C 20 cycloalkyloxy group, C 6 to C 20 cycloalkylalkyloxy group, and C 6 to C 20 alkylcycloalkyloxy group, wherein the lubricating oil composition is free of any zinc dialkyl dithiophosphate.