| abstract |
A lubricant composition comprising an oil of lubricating viscosity; (A) 0.05 to 1.5 percent by weight of a copolymer comprising 70 to 79 percent by weight of units derived from ethylene (“E”), having a M w of 50,000 to 100,000, M w / M n less than 3, density (“D”) of 860 to 896 kg/m 3 , and a melting point (“T m ”) of 15° C. to 60° C., wherein E and T m fulfill the expression n 3.44 E −206≧ T m ; n and (B) 0.05 to 1.5 percent by weight of a block copolymer comprising a first block which comprises a vinyl aromatic comonomer and a second block which comprises a diene comonomer, the diene monomer-containing block being hydrogenated; wherein the weight ratio (A):(B) is 20:80 to 60:40; exhibits good low temperature performance and durability. |