| abstract |
Provided are a lubricating oil composition and a method of using the lubricating oil composition. The lubricating oil composition is used for a diesel engine equipped with a supercharger, and the lubricating oil composition contains a base oil (A) containing a polyalpha-olefin (A1), and a viscosity index improver (B) with an SSI (shear stability index) of 20 or less, and a distillation amount of light fractions below 496°C in a gas chromatography distillation test of less than 80% by volume, the lubricating oil composition In the case of a diesel engine equipped with a supercharger with a compressor outlet temperature of 190°C or higher, the continuity of the effect of suppressing the formation of deposits that can be generated in the compressor is improved, and the compressor can be maintained for a long time. high efficiency. |