Abstract: A high temperature lubricant composition for lubricating conveyored oven chains and other high temperature applications comprises at least one polyol polyester polymer and optionally at least one additive. The polyol polyester polymer can be made from esterification of at least one polyol, at least one dicarboxylic acid and at least one monocarboxylic acid. Optionally, at least one polyol polyester, at least one extreme pressure/antiwear agent and/or at least one metal deactivator is added to the final lubricant composition. The lubricant has a kinematic viscosity @40° C. of from about 50 to about 1,000 centistokes, a viscosity index of at least about 140, and a flash point of at least about 270° C. The lubricants have low evaporation loss, high resistance to oxidation, and provide reduction of friction when used in high temperature lubricant applications.