| 摘要 |
The present invention provides a lubricating oil composition comprising: a lubricating base oil including a lubricating base oil component having a urea adduct value of 4% by mass or less, a kinematic viscosity of 25 mm2/s or less at 40° C. and a viscosity index of 120 or greater, wherein the amount of the lubricating base oil component is 10 to 100% by mass based on a total mass of the lubricating base oil, and a poly(meth)acrylate based viscosity index improver including a structural unit represented by general formula (1): wherein R1 represents hydrogen or a methyl group, and R2 represents a straight or branched hydrocarbon group with 16 or more carbon atoms, and wherein the proportion of the structural unit represented by general formula (1) is 0.5 to 70% by mole, the lubricating oil composition having a kinematic viscosity of 4 to 12 mm2/s at 100° C. and a viscosity index of 140 to 300.
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