LUBRICANT WITH A HIGHER MOLECULAR WEIGHT COPOLYMER LUBE OIL FLOW IMPROVER

A lubricant which comprises: a mineral oil basestock which has been dewaxed via catalytic cracking and/or catalytic isomerization; an alkylene-alkylene copolymer; and a lubricating oil flow improver formed from the reaction product of: (a) an unsaturated carboxy ester formed via the esterification of an unsaturated carboxylic acid or its corresponding anhydride with a monohydric aliphatic alcohol having an average carbon number of between about 10 to 18, the unsaturated carboxy ester having the formula: wherein R' is selected from the group consisting of hydrogen and COOR and wherein R is a C6 to C22 alkyl group; and (b) a monomer selected from the group consisting of (i) a vinyl ester having the formula: wherein R1 comprises an alkyl group containing from 1 to 18 carbon atoms; (ii) an olefin having the formula wherein R1 and R2 can independently be hydrogen, an alkyl having from 1 to 28 carbon atoms, or a substituted aryl group, provided both R1 and R2 are not hydrogen, the reaction product having a specific viscosity in the range between about 0.3 to 1.5, or a weight average molecular weight of between about 50,000 to 350,000 Daltons.