Patent ID: 9029303
Filing Date: 2015-05-12
Classification: C10M,C10N

Abstract:
1. A lubricant oil composition comprising: a lubricant base oil whose kinematic viscosity at 100° C. is 1 to 20 mm a viscosity index improver in which a ratio M1a/M2a of a total area M1a of peaks in a chemical shift between 29-31 ppm to a total area M2a of peaks in a chemical shift between 64-69 ppm based on a total area of all peaks is not less than 10 in a spectrum obtained by wherein a ratio of an HTHS viscosity of the lubricant oil composition at 150° C. to an HTHS viscosity of the lubricant oil composition at 100° C. satisfies a condition represented by a following equation (A): wherein HTHS (100° C.) represents the HTHS viscosity of the lubricant oil composition at 100° C., and HTHS (150° C.) represents the HTHS viscosity of the lubricant oil composition at 150° C.