Low Sulfur and Low Metal Additive Formulations for High Performance Industrial Oils

A lubricating oil, comprising

• a) at least three base stocks;
• b) a first base stock PAO with a viscosity at least 100 cSt, Kv100° C.;
• c) a second base stock comprising a oil with a viscosity less than 40 cSt, Kv100° C.
• d) a third basestock comprising low viscosity co-base oil selected from the group consisting of Ester, alkylated aromatic, and any combination thereof
• e) an additive package comprising at least one antiwear additive, at least one antioxidant additive, at least one rust inhibitor additive, at least one metal passivator additive, at least one demulsifier additive, at least one defoamant additive;
• f) wherein the composition has less than 1000 ppm phosphorous, less than 500 ppm nitrogen, less than 10 ppm metals, less than 30 ppm sulfur and a TAN of less than 1.

A method of obtaining favorable gear oil properties, comprising;

• a) obtaining a first synthetic base stock lubricant, the first base stock having a viscosity greater than 100 cSt, Kv100° C. and the first bases stock having a molecular weight distribution (MWD) as a function of viscosity at least 10 percent less than algorithm
• MWD=0.2223+1.0232*log(Kv at 100° C. in cSt);
• b) obtaining a second synthetic base stock lubricant, the second base stock lubricant has a viscosity less than 60 cSt, Kv100° C.;
• c) obtaining an additive package comprising at least one antiwear additive, at least one antioxidant additive, at least one rust inhibitor additive, at least one metal passivator additive, at least one demulsifier additive, at least one defoamant additive;
• d) blending the first base stock, the second base stock and additive package to produce a lubricating oil wherein the lubricating oil has less than 1000 ppm phosphorous, less than 500 ppm nitrogen, less than 10 ppm metals, less than 30 ppm sulfur and a TAN of less than 1.