Patent ID: 7662271
Filing Date: 2010-02-16
Classification: C10M,C10N

Abstract:
1. A lubricating oil, comprising: a base oil having greater than 90 wt % saturates, less than 10 wt % aromatics, a base oil viscosity index greater than 120, sulfur less than 0.03 wt %, and a sequential number of carbon atoms; wherein the lubricating oil has: a. a lubricating oil viscosity index between 155 and 300; b. a result of greater than 680 minutes in the rotary pressure vessel oxidation test by ASTM D 2272-02 at 150 degrees C.; and c. a kinematic viscosity at 40° C. from 19.8 cSt to 748 cSt; wherein the lubricating oil is a hydraulic fluid or a circulating oil.