| abstract |
The invention provides a lubricating composition containing (a) a polymer derived from greater than 50 wt % or more of a non-diene monomer, wherein the polymer has a weight average molecular weight of about 2000 to about 200,000, and wherein the polymer has a shear stability index of about 0 to about 25; (b) a phosphorus-containing acid, salt, or ester; (c) an extreme pressure agent, other than a phosphorus-containing acid, salt, or ester; and (d) an oil of lubricating viscosity. The invention further provides a method for lubricating a mechanical device with the lubricating composition. |