| abstract |
PROBLEM TO BE SOLVED: To provide a shock absorber oil composition for automobiles which has cavitation preventing performance more than conventional products, hardly causes a decrease in damping force for a long time, and is excellent in sustainability. Kind Code: A1 A kinematic viscosity at 40 ° C. is 1 to 45 mm 2. / S of a base oil having a weight average molecular weight (Mw) of 60,000 to 350,000 as a viscosity index improver, based on the total amount of the composition, and 1 to 1 of an ethylene-propylene copolymer or a styrene-maleic acid ester copolymer. It is a shock absorber oil composition for automobiles, which is blended at 15% by mass. |