Patent ID: 7871965

Claim:
A gear oil additive composition comprising: a) an organic polysulfide containing greater than 30 wt % of a dialkyl polysulfide compound or mixture of dialkyl polysulfide compounds, of the formula: R 1 —(S) x —R 2 wherein R 1 and R 2 are independently an alkyl group of about 4 to 12 carbon atoms and x is 4 or greater; b) a thiadiazole; and c) at least one ashless phosphorus-containing wear inhibitor compound, wherein the composition comprises from about 35 to 75 wt % of the organic polysulfide, about 0.5 to 15 wt. % of the thiadiazole, and about 5.0 to 40 wt % of the ashless phosphorus-containing wear inhibitor compound.