| abstract |
[PROBLEMS] To improve fuel efficiency, low evaporation and low temperature viscosity, and high temperature and high temperature at 150 ° C without using synthetic oil such as poly-α-olefin base oil and ester base oil, and low viscosity mineral oil base oil. To provide a lubricating oil composition capable of achieving both fuel economy, low evaporation at NOACK and low temperature viscosity at −35 ° C. or lower while maintaining shear viscosity. A urea adduct value is 4% by mass or less, a kinematic viscosity at 40 ° C. is 25 mm 2 / s or less, a viscosity index is 120 or more, and a value obtained by subtracting a 5% distillation temperature from a 90% distillation temperature is 75. A lubricating base oil containing 10% by mass to 100% by mass of a base oil component of a lubricating base oil having a temperature of 100 ° C. or less, and a viscosity index improver, and a kinematic viscosity at 100 ° C. of 4 to 12 mm. A lubricating oil composition having a viscosity index of 140 to 300 at 2 / s. [Selection figure] None |