| abstract |
(57) Abstract: In an automatic transmission for a vehicle equipped with a slip control mechanism, an automatic transmission having a high shudder vibration prevention performance and a sufficient transmission torque capacity even when a lockup mechanism is operated in a low speed range. To provide a lubricating oil composition for machines. SOLUTION: The base oil has a general formula: (In the above general formula [I], R 1 and R 2 may be the same or different from each other, each is a hydrocarbon group having 5 or more carbon atoms, and R 3 is a hydrocarbon group having 1 to 5 carbon atoms. , R 4 is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and the hydrocarbon group may have an amino group and / or an amide bond, and n is an integer of 0 to 10.) There is provided a lubricating oil composition for an automatic transmission, which comprises a compound represented by: |