| abstract |
[PROBLEMS] To provide an additive for lubricating oil having excellent load carrying capacity and wear resistance, low corrosiveness to non-ferrous metals such as copper, and excellent hydrolysis resistance, and a lubricating oil composition containing the additive To provide. SOLUTION: General formula (I) R 1 OOC-A 1 -S x -A 2 -COOR 2 (I) (In the formula, R 1 and R 2 are each independently an alkyl group having 3 to 18 carbon atoms, and A 1 and A 2 are each independently CR 3 R 4 or CR 5 R 6 -CR 7 R. And R 3 to R 8 are each independently a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms, and x is 2). An additive for lubricating oil, and a lubricating oil composition containing the additive. [Selection figure] None |