Patent ID: 8394746
Filing Date: 2013-03-12
Classification: C10M,C10N

Abstract:
1. A gear and bearing oil, comprising a) at least three base stocks; b) a first PAO base stock 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 a co-base oil selected from the group consisting of a PAO with a viscosity of at least 1.5 cSt, Kv100° C. and no more than 100 cSt, Kv100° C, a Group V base stock including ester base stock, 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 with the proviso that the additive package does not include any sulfur containing and any metallic containing additives; wherein the antiwear additive is at least 0.05 and less than 1 weight percent of the final formulation the antioxidant additive is at least 0.05 and less than 0.5 weight percent of the final formulation, the rust inhibitor additive is at least 0.05 and less than 0.5 weight percent of the final formulation, the metal passivator additive is at least 0.01 and less than 0.5weight percent of the final formulation, the demulsifier additive is at least 0.05 and less than 1 weight percent of the final formulation, and the defoamant additive is at least 0.005 and less than 1 weight percent of the final formulation; f) wherein the gear and bearing 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.