Patent ID: 11946012
Assignee: SHELL USA, INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A lubricating oil composition comprising
(A-1) a Fischer-Tropsch derived base oil with a kinematic viscosity at 100° C. of 2 to 3.5 mm2/s,
(A-2) a polyalphaolefin with a kinematic viscosity at 100° C. of 400 to 700 mm2/s,
(A-3) a complete ester compound that is an ester of a trihydric or higher polyol with a kinematic viscosity at 100° C. of 3 to 6 mm2/s, and
(B-1) a partial ester compound of an unsaturated fatty acid and a polyol, wherein the partial ester compound of the unsaturated fatty acid and the polyol is a monoester of an unsaturated fatty acid and glycerol,
wherein the unsaturated fatty acid in (B-1) is an unsaturated fatty acid having from 10 to 20 carbon atoms, and the lubricating oil composition has a kinematic viscosity at 40° C. of 25 mm2/s to 45 mm2/s,
wherein the lubricating oil composition comprises the Fischer-Tropsch derived base oil (A-1) in an amount from 30 to 80 mass % based on the total mass of the composition, the polyalphaolefin (A-2) in an amount from 5 to 40 mass % based on the total mass of the composition, and the ester compound (A-3) in an amount from 5 to 20 mass % based on the total mass of the composition, and
wherein the lubricating oil composition comprises the partial ester compound of the unsaturated fatty acid (B-1) in an amount from 0.2 to 2 mass % based on the total mass of the composition.