| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating oil composition which is small in evaporation loss at high temperature and is sufficiently long in solidification time, is hardly sludged and is high in thermal stability. SOLUTION: The lubricating oil composition for high temperature has a polyolester and an aromatic ester as a base oil and includes an amine based oxidation inhibitor, a phenol based oxidation inhibitor and a thioether based oxidation inhibitor. In contents in the lubricating oil composition, 69 to 85 mass% polyolester, 5 to 20 mass% aromatic ester, 0.1 to 10 mass% amine based oxidation inhibitor, 0.1 to 5 mass% phenol based oxidation inhibitor and 0.1 to 5 mass% thioether based oxidation inhibitor are preferable. COPYRIGHT: (C)2010,JPO&INPIT |
