Gear lubricant with a base oil having a low traction coefficient

US7425524B2 · kind B2 · utility

Assignee

• CHEVRON U.S.A. INC. · US

Inventors

• Michael J. Haire · Petaluma, US
• John A. Zakarian · Hercules, US
• John M. Rosenbaum · Richmond, US
• Nancy J. Bertrand · Lafayette, US
• Stephen J. Miller · San Francisco, US
• Trevor Miller · Dublin, US
• Vivek Palekar · Pleasanton, US
• Ajit Ramchandra Pradhan · Walnut Creek, US

Key dates

• Filing date: Apr 7, 2006
• Grant date: Sep 16, 2008
• Expiry date: Jun 9, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A multigrade automotive gear lubricant comprising a base oil having a traction coefficient less than 0.021. A method for saving energy using a gear lubricant, comprising blending a multigrade gear lubricant by adding a base oil having a traction coefficient less than 0.021, and using the gear lubricant in an axle or differential. A process for making an energy saving automotive gear lubricant having a kinematic viscosity at 100° C. greater than 10 cSt. A gear lubricant comprising a FT derived base oil having a VI greater than 150 and a traction coefficient less than 0.015. A finished lubricant, comprising a FT derived base oil having a traction coefficient less than 0.015. A base oil having a traction coefficient less than 0.011 and a 50 wt % boiling point greater than 582° C.