Patent ID: 9404062
Filing Date: 2016-08-02
CPC Classification: C10M,C10N

Claim Text:
1. A lubricating oil composition having a kinematic viscosity at 100° C. of 9.0-12.5 mm 2 /s, a HTHS viscosity at 150° C. of 2.8 mPa·s or greater, and a ratio of the HTHS viscosity at 150° C. to the HTHS viscosity at 100° C. being 0.50 or greater, and comprising: a lubricating base oil with a kinematic viscosity at 100° C. of 1-10 mm a viscosity index improver having a weight-average molecular weight of 300,000 or greater and a ratio of weight-average molecular weight to PSSI of 1.0×10