| abstract |
Provided is a lubricating oil composition effective for reducing wear of metal parts of an internal combustion engine. A lubricating oil composition comprising (a) an oil having a major amount of lubricating viscosity and (b) an oil-soluble titanium compound of formula (I), but no zinc dialkyldithiophosphate: [Chemical 1] In the formula, R 1 , R 2 , R 3 , and R 4 are each independently a C 1 to C 20 alkoxy group. [Selection figure] None |