LUBRICANT COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a lubricant composition for imparting satisfactorily fuel-saving properties while keeping other practical performances such as durability.

SOLUTION: The lubricant composition contains a lubricant base oil having 1-5 mm2/s kinetic viscosity at 100°C and a viscosity index improver having≥0.50 ratio M1/M2 (wherein M1 is the total area of peaks between 51-52.5 ppm chemical shift relative to the total area of all peaks; M2 is the total area of peaks between 64-66 ppm chemical shift relative to the total area of all peaks) in a spectrum obtained by13C-NMR and satisfies inequality (A): HTHS(100°C)/HTHS(150°C)≥0.50 (wherein HTHS(100°C) is the HTHS viscosity at 100°C; HTHS(150°C) is the HTHS viscosity at 150°C).

COPYRIGHT: (C)2011,JPO&INPIT