| abstract |
The object of the present invention is to provide a lubricating oil composition which, in addition to further saving fuel, can achieve good wear resistance and good scratch resistance of bearings, while maintaining the Durability and seizure resistance of gear oils for high-speed gear mechanisms. A lubricating oil composition comprising a Fischer-Tropsch derived base oil having low kinematic viscosity at high temperature, a polyalphaolefin having high kinematic viscosity at high temperature, and a trivalent or higher polyol having low kinematic viscosity at high temperature A combination of ester compounds, and also a partial ester compound of an unsaturated fatty acid and a polyhydric alcohol, including a monoester compound of the unsaturated fatty acid and the polyhydric alcohol. |