LUBRICANT COMPOSITION

摘要

Disclosed is a lubricant composition containing: a lubricant base oil which has a kinematic viscosity of 1 to 20mm2/s at 100°C; a viscosity index improver (A) which has a 13C-NMR spectrum in which the ratio between the total area (M1) of a peak having a chemical shift from 36 to 38ppm and the total area (M2) of a peak having a chemical shift from 64 to 66ppm is 0.20 or more (M1/M2) in relation to the total area of all peaks; a friction modifier (B); and an overbased metal salt (C) which is obtained by over-basifying an oil-soluble metal salt with a boric acid salt of an alkali earth metal.