| abstract |
Provided is a lubricating oil composition that has excellent fuel economy and can suppress the occurrence of noise and vibration. A lubricating base oil having a kinematic viscosity at 100 ° C. of 3.5 to 10 mm 2 / s and a viscosity index of 100 or more is used. (A) Ethylene having a number average molecular weight of 2,500 to 25,000 A lubricating oil composition comprising an α-olefin copolymer and / or (b) a polymethacrylate having a number average molecular weight of 10,000 to 30,000, wherein the composition has a kinematic viscosity at 100 ° C. of 5 A lubricating oil composition having a viscosity of 6 to 15.0 mm 2 / s. [Selection figure] None |