Patent ID: 7683013

Claim:
A lubricating oil, comprising a) at least two base stocks; b) at least 10 percent and no more than 73.15 percent of a first base stock comprising a synthetic oil with a viscosity greater than 100 cSt, Kv100° C.; c) at least 5 percent and no more than 30 percent of a second base stock comprising a oil with a viscosity less than 10 cSt, Kv100° C.; d) a viscosity difference of the first and second base stocks of at least 96 cSt, Kv100° C. wherein the Lubricating oil provides a FVA 54 Micropitting Test Fail Load Stage greater than 10; and c) wherein the lubricant composition has a viscosity of greater than 39 cSt, Kv100° C. and a viscosity index of at least 161.