Patent ID: 7772168

Claim:
A lubricating composition comprising, in weight %, greater than 90 percent of a vegetable oil having an oleic acid content of greater than 70%, and an additive composition comprising: (a) about 1.5 to 2 percent triphenylphosphorothionate (TPPT), (b) about 0.1 to 3 percent hindered phenolic antioxidant, (c) about 0.05 to 0.25 percent 1-[di(4-octylphenyl)aminomethyl]tolutriazole, and (d) about 0.05 to 0.5 percent alkyl succinic acid half ester rust inhibitor wherein the composition is free or substantially free of phosphorus- or sulfur-based ashless antiwear additives, with the exception of TPPT.