| 摘要 |
A lubricating oil composition having improved temperature characteristics is disclosed, containing: (A) a base oil having a kinematic viscosity at 100 DEG C of 1.5 to 50 cSt, a pour point of -25 DEG C or lower and a viscosity index of at least 60; (B) an ethylene- alpha -olefin copolymer having a number average molecular weight of 1,000 to 8,000; and (C) at least one additive selected from an extreme pressure agent, an anti-wear agent, an oiliness agent and a detergent dispersant. The present composition has a high viscosity index and exhibits good temperature characteristics, particularly low temperature characteristics, and further is excellent in shear stability, extreme pressure properties, wear resistance, detergency and so on. Thus it is useful as a gear oil for cars or industrial machines, an internal combustion engine oil, an automatic transmission oil and so on. |
