| abstract |
PROBLEM TO BE SOLVED: To provide a fluid composition for a fan clutch which is excellent in thermal oxidation stability and shear stability at high temperature and has little viscosity change over a long period of time. [Solution] A composition comprising 0.01 to 5% by mass of calcium sulfonate in a base oil composed of dimethyl silicone oil having a kinematic viscosity at 25 ° C. of 1,000 to 50,000 mm 2 / s, based on the total amount of the composition. A fan clutch fluid composition, wherein the composition has a base number of 0.5 to 20 mgKOH / g. [Selection figure] None |