Low viscosity engine oil compositions

US9234150B2 · kind B2 · utility

Assignee

• EXXONMOBIL RESEARCH AND ENGINEERING COMPANY · US

Inventors

• Richard Wayne Martin · Teaneck, US
• Douglas E. Deckman · Mullica Hill, US
• Kevin J. Kelly · Mullica Hill, US
• Craig J. Emett · Houston, US
• Mark P. Hagemeister · Houston, US
• Bruce A. Harrington · Houston, US
• Chon-Yie Lin · Houston, US
• Phillip T. Matsunaga · Houston, US
• Charles J. Ruff · Houston, US
• Kevin B. Stavens · Seabrook, US

Key dates

• Filing date: Sep 12, 2012
• Grant date: Jan 12, 2016
• Expiry date: May 22, 2034

Classification

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

Abstract

This invention is directed to ultra-low viscosity passenger car engine oil compositions with a kinematic viscosity at 100° C. of from 4 to 6 cSt, and comprising in admixture 60 wt % to 90 wt % of a first base oil component, based on the total weight of the composition, the first base oil component consisting of a polyalphaolefin base stock or combination of polyalphaolefin base stocks, each having a kinematic viscosity at 100° C. of from 3.2 cSt to 3.8 cSt; and 0.1 wt % to 20 wt % of a second base oil component, based on the total weight of the composition, the second base oil component consisting of a Group II, Group III or Group V base stock, or any combination thereof; wherein the composition comprises from 0 wt % to less than 0.25 wt % viscosity index improver, on a solid polymer basis.