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 cost saving effect.
The lubricant composition for an internal combustion engine comprises: a lubricant base oil having a viscosity index of 100, an initial boiling point of 400C and a 90% distillation temperature of 470C, wherein the value given by subtracting a 10% distillation temperature from the 90% distillation temperature is 70C; an ash-free oxidation inhibitor not containing sulfur as a constituent element; and at least one selected from an ash-free oxidation inhibitor containing sulfur as a constituent element and an organic molybdenum compound. The lubricant base oil comprises a first lubricant base oil component having a urea adduct value of 4 mass%, a viscosity index of 100 and kinematic viscosity at 100C of 3.5 to 4.5 mm2/g, and a second lubricant base oil component having a urea adduct value of 4 mass%, a viscosity index of 120 and kinematic viscosity at 100C of 4.5-20 mm2/g.
MATSUI SHIGEKI
| JPS63309592A | 1988-12-16 | |||
| JP2005530902A | 2005-10-13 | |||
| JP2007284635A | 2007-11-01 | |||
| JP2008120908A | 2008-05-29 | |||
| JP2008231189A | 2008-10-02 | |||
| JPS4825003A | 1973-04-02 | |||
| JPS30624B1 | ||||
| JP2007246661A | 2007-09-27 | |||
| JP2006241437A | 2006-09-14 | |||
| JP2008013684A | 2008-01-24 | |||
| JP2007016172A | 2007-01-25 | |||
| JP2008013281A | 2008-01-24 |
| US2861941A | 1958-11-25 | |||
| US2890161A | 1959-06-09 | |||
| US3078222A | 1963-02-19 |
Yoshiki Kuroki
Yoshinori Shimizu