| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricant composition which is excellent in viscosity-temperature characteristic and low-temperature viscosity characteristic, and can achieve adequate long-drain property and fuel economy.SOLUTION: A lubricant composition for an internal combustion engine contains: a lubricant base oil having a viscosity index of 100 or more, an initial boiling point of 400°C or lower and a 90% distillation temperature of 470°C or higher, and a value given by subtracting a 10% distillation temperature from the 90% distillation temperature of 70°C or higher; an ashless antioxidant which does not contain sulfur as a constituent element; and at least one kind selected from an organomolybdenum compound and an ashless antioxidant containing sulfur as a constituent element. The lubricant base oil contains: a first lubricant oil base oil component having a urea adduct value of 4 mass% or less, a viscosity index of 100 or more, a dynamic viscosity at 100°C of 3.5 mm/s or more and less than 4.5 mm/s; and a second lubricant oil base oil component having a urea adduct value of 4 mass% or less, a viscosity index of 120 or more, a dynamic viscosity at 100°C of 4.5-20 mm/s. |
