abstract |
The present invention relates to a system oil composition for a crosshead type diesel engine that has excellent heat resistance and is effective in improving fuel efficiency. More specifically, the present invention relates to (A) a kinematic viscosity at 50 ° C. based on mineral oil and / or synthetic oil. in There 35 mm 2 / s or more, a high shear viscosity of less 45 mPa · s at 50 ° C., and crosshead type diesel engine for the system oil composition, wherein the high shear viscosity at 70 ° C. is 15 mPa · s or more It is about. |