LUBRICANT COMPOSITION FOR AN INTERNAL COMBUSTION ENGINE

摘要

A lubricating oil composition for an internal combustion engine contains: a base oil including a component (A) of a polyalphaolefin having a kinematic viscosity at 100 degrees C of 5.5 mm 2 /s or less, a CCS viscosity at -35 degrees C of 3000 mPa·s or less and a NOACK of 12 mass% or less and a component (B) of a mineral oil having a viscosity index of 120 or more; and polyisobutylene having a mass average molecular weight of 500,000 or more. A content of the composition (A) is 25 mass% or more of a total amount of a lubricating oil.