| abstract |
(57) [Abstract] (with correction) [PROBLEMS] To provide a long-life lubricating oil composition which is excellent in oxidation stability at high oil temperature, anti-abrasion property and anti-pitting property. SOLUTION: A) 0.15 to 5.0% by mass of a nitrogen compound of the general formula 1, and B) a general formula 2 and / or a base oil composed of a mineral oil, a synthetic oil or a mixed oil thereof, based on the total amount of the composition. 3 phosphorus compounds and / or their salts have a phosphorus concentration of 50 A lubricating oil composition containing -800 mass ppm. (R 1 is a C 1-30 alkyl group, R 2 is H or C 1 to 24 alkyl groups, R 3 to R 8 are H or C 1 to 30 X 1 to X 6 represent an enzyme or sulfur. ) |