| 摘要 |
A lubricating oil composition which comprises a base oil of (A) 100 to 5 % by weight of a mineral oil having a kinematic viscosity at 40.degree.C of 2 to 2000 cSt, a viscosity index of 70 or higher, a nitrogen content of 20 ppm or less and a bromine value of 25 or less, and (B) 0 to 95 % by weight of polybutene having a molecular weight of 200 to 1000; and at least one additive selected from an extreme pressure agent, an anti-wear agent and an oiliness agent is disclosed. when the lubricating oil composition is used, fatigue damage of a metal is decreased and it shows good oxidation resistance. |
