abstract |
The lubricating oil composition of the present invention contains a lubricating base oil and an ester of 3,4,5-trihydroxybenzoic acid in an amount of 5 to 5000 mass ppm and a phosphorus compound in an amount of 0.001 to 10.0 mass% based on the whole amount of the lubricating oil composition. INDUSTRIAL APPLICABILITY The lubricating oil composition of the present invention remarkably reduces abrasion, exhibits low friction coefficient and stable characteristics, and has a high rust inhibitive effect in the iron-based percussion portion. Therefore, the lubricating oil composition of the present invention is suitable for long-term use, and exhibits remarkable effects on energy saving from characteristics of low and stable friction coefficient. |