| 摘要 |
The present invention is to provide a lubricating oil composition which is a lubricating oil composition used for internal combustion engines of passenger and commercial four-wheeled vehicles and can exhibit excellent fuel efficiency performance and wear resistance reliability. The present invention is a lubricating oil composition for internal combustion engines of passenger and commercial four-wheeled vehicles including a base oil, and a complex polyester mixture, in which the base oil includes at least one of poly-±-olefin, an ester-based base oil, or a partially hydrogenated mineral oil, the complex polyester mixture includes a polyester obtained by condensing a polyhydric alcohol, a polycarboxylic acid, and a monohydric alcohol having an oxyalkylene group, the content of the complex polyester mixture is 0.01% by mass or more with respect to the total mass of the lubricating oil composition for internal combustion engines, the high-temperature shear viscosity (HTHS viscosity) of the lubricating oil composition for internal combustion engines at 150°C, is 1.0 mPa·s to 2.6 mPa·s, and the NOACK evaporation amount is 40% or less. |
