| abstract |
PCT No. PCT/JP87/00658 Sec. 371 Date Apr. 11, 1988 Sec. 102(e) Date Apr. 11, 1988 PCT Filed Sep. 4, 1987 PCT Pub. No. WO88/02021 PCT Pub. Date Mar. 24, 1988.The present invention provides a lubricating oil composition comprising 97 to 60% by weight of mineral oil and 3 to 40% by weight of polyester, said mineral oil having a kinematic viscosity at 100 DEG C. of 2 to 50 centistokes, a pour point of -5 DEG to -30 DEG C., a viscosity index of not less than 80 and % CA of not more than 3. This lubricating oil composition is suitably used for lubrication of parts including a wet brake and a wet clutch, such as automatic transmissions and tractors. The lubricating oil composition of the present invention has a suitable viscosity at high temperatures and further is low in low temperature viscosity. Furthermore the lubricating oil composition of the present invention is excellent in friction characteristics, oxidation stability and also in seal rubber compatibility. |