| abstract |
The present invention provides good shear stability and low temperature performance for lubricant formulations. The lubricant composition of the present invention comprises an oil having a lubricating viscosity; (A) 0.05 to 1.5 weight percent copolymer, wherein the copolymer is derived from 70 to 79 weight percent ("E") ethylene. Having a weight average molecular weight of 50,000 to 100,000, a polydispersity of less than 3, a density of 860 to 896 kg / m 3 (“D”), and a melting point of 15 ° C. to 60 ° C. (“Tm”) Where E and Tm are of the formula: And (B) 0.05 to 1.5 weight percent of a block copolymer, the block copolymer comprising a first block comprising a vinyl aromatic comonomer and a second block comprising a diene comonomer; A block copolymer, wherein the diene monomer-containing block is hydrogenated; the weight ratio (A) :( B) is from 20:80 to 60:40; the lubricant composition has good low temperature performance and durability Showing gender. [Selection figure] None |