| 摘要 |
The present invention provides a lubricating oil composition that has excellent torque capacity and shifting properties as well as excellent anti-wear properties for wet friction materials and can maintain initial torque capacity and shifting properties for a long period of time, suitable for automatic transmissions and/or continuously variable transmissions. The lubricating oil composition comprising a lubricating base oil and on the basis of the total mass of the composition (A) 0.5 percent by mass or more of a fatty acid amide compound; (B) 0.05 percent by mass or more of thiadiazole; and (C) 0.1 percent by mass of a phosphorus-containing additive, and containing sulfur in an amount of 0.2 percent by mass or more on the basis of sulfur and phosphorus in an amount of 0.2 percent by mass or less on the basis of phosphorus, the ratio of the sulfur basis percent by mass/the phosphorus basis percent by mass (S/P) being from 3.0 to 5.0:
wherein R 1 is an alkyl or alkenyl group having 10 to 30 carbon atoms, R 2 , R 3 , R 5 and R 6 are each independently hydrogen or an alkyl group having 1 to 3 carbon atoms, R 7 is hydrogen or an alkyl or alkenyl group having 1 to 30 carbon atoms, R 4 is an alkylene group having 1 to 4 carbon atoms, k is an integer of 0 to 6, m is an integer of 0 to 2, and n, p and r are each an integer of 0 to 1. |
