Patent ID: 8703677

Claim:
A lubricating oil composition comprising a Group III base oil; and a combination of ester base stocks, wherein the combination comprises: (a) an ester base stock having kinematic viscosity of 2-10 cSt at 100° C., wherein the ester base stock comprises a diester based on short chain fatty acids, (b) an ester base stock having kinematic viscosity of greater than 10 to 50 cSt at 100° C., wherein the ester base stock (b) comprises a polymer ester, and (c) an ester base stock having kinematic viscosity of greater than 100 cSt at 100° C., wherein the ester base stock (c) comprises a complex ester, wherein the Group III base oil is present in more than about 50% by weight, the ester base stock (a) is present in about 10% to about 25% by weight, the ester base stock (b) is present in about 10% to about 20% by weight, and the ester base stock (c) is present in about 1% to about 10% by weight.