Patent ID: 8389449

Claim:
A gear oil composition comprising: a) a major amount of a base oil of lubricating viscosity; and b) a minor amount of a gear oil additive composition comprising: (i) an organic polysulfide containing at least 50 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 20 carbon atoms and x is 4 or greater; (ii) a thiadiazole, and (iii) at least one ashless phosphorous-containing wear inhibitor compound; wherein component (i) is present at about 0.1 to 3.6 wt. %, wherein component (ii) is present at about 0.01 to 0.6 wt. %, and component (iii) is present at about 0.1 to 2.5 wt. %, all weight percentages base on the total weight of the gear oil composition.