| abstract |
(57) [Summary] [Problem] No precipitation occurs even during long-term storage, Provided is an engine oil having a long life and excellent fuel economy. (A) A kinematic viscosity at 100 ° C. of 2-2. 0 mm 2 / s, 80 to 100% by mass of a polyα-olefin or a hydride thereof, and 0 to 100% of a polyol ester. (B) a synthetic lubricating base oil containing 20% by mass At least one organic molybdenum compound selected from the group consisting of molybdenum dithiophosphate and molybdenum dithiocarbamate is 300 to 1500 ppm by mass in terms of molybdenum element based on the total amount of the composition, and (C) the number average molecular weight (Mn) is 1, A lubricating oil composition for an engine comprising one to two or more compounds selected from bissuccinimides having a long-chain hydrocarbon group of 500 to 3,500 and derivatives thereof in an amount of 2 to 15% by mass based on the total amount of the composition. object. |