abstract |
The lubricating oil composition of the present invention contains a lubricating oil base oil, an ester of 5 to 5000 ppm by weight of 3,4,5-trihydroxybenzoic acid, and a 0.001 to 10.0% by mass phosphorus compound based on the total amount of the lubricating oil composition. The lubricating oil composition of the present invention significantly reduces wear, exhibits low friction coefficient and stable characteristics, and has a high antirust effect in the iron-based perturbation portion. Therefore, the lubricating oil composition of the present invention is suitable for long-term use and has a remarkable effect on energy saving from the characteristics of low and stable friction coefficient. |