| 摘要 |
An engine oil composition comprising: a lubricating base oil having a kinematic viscosity at 100°C of 1 to 5 mm 2 /s; a poly(meth)acrylate viscosity index improver containing a structural unit represented by the formula (1) in a proportion of 30 to 90 mol% and having a PSSI in an ultrasonic shear test of 15 or less; and a friction modifier, the engine oil composition has a kinematic viscosity at 100°C of 4 to 8 mm 2 /s, and an HTHS viscosity at 150°C of less than 2.6 mPa·s: [wherein R 1 represents hydrogen or a methyl group; and R 2 represents a linear or branched hydrocarbon group having a carbon number of 6 or less]: |
