| abstract |
The lubricating composition is an esterified copolymer comprising (A) a unit derived from a vinyl monomer (A1) and a unit derived from a carboxylic acid monomer (A2), the vinyl monomer comprising a vinyl aliphatic monomer, An esterified copolymer wherein the carboxylic acid monomer comprises an ethylenically unsaturated carboxylic acid esterified with a primary alcohol or derivative thereof; and (B) an oil of lubricating viscosity. The lubricating composition has at least one (or at least) acceptable or improved HTHS, KV, shear stability, acceptable or improved viscosity index control and acceptable or improved low temperature viscosity (or at least It has been found that lubricants having two or all) can be provided. |