Lubricating oil composition

US6300291A · kind A · utility

Assignee

• Infineum USA L.P. · US

Inventors

• Rolfe J. Hartley · Cranbury, US
• Malcolm Waddoups · Westfield, US
• Ian Bell · Woodstock, GB
• Thomas R. Bidwell · Delaware, US
• Gordon R. Farnsworth · Scotch Plains, US
• Taisuke Miyoshi · Tokyo, JP

Key dates

• Filing date: May 19, 1999
• Grant date: Oct 9, 2001
• Expiry date: May 19, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A lubricating oil composition exhibiting improved low temperature anti-wear performance and improved fuel economy and fuel economy retention properties, which comprises: (a) an oil of lubricating viscosity; (b) at least one calcium detergent; (c) at least one oil soluble molybdenum compound; (d) at least one nitrogen containing friction modifier; and (e) at least one zinc dihydrocarbyldithiophosphate compound, wherein the composition has a NOACK volatility of about 15.5 wt. % or less and contains from about 0.058 to 0.58 wt. % calcium from the calcium detergent, molybdenum in an amount up to about 350 ppm from a molybdenum compound, and phosphorus in an amount up to about 0.1 wt. % from a zinc dihydrocarbyldithiophosphate compound.