US 6,723,685 B2
Lubricating oil compositionGeneral
US 6,723,685 B2
Lubricating oil composition
Tech Center:
1700 Chemical and Materials Engineering
Examiner:
Ellen M McAvoy
Art Unit:
1764 Organic Chemistry, Polymers, Compositions
Agent:
Inventors:
Rolfe J. Hartley; Malcolm Waddoups
Assignee:
Priority:
04/05/02
Filed:
04/05/02
Granted:
04/20/04
Expiration:
04/05/22
Abstract
A lubricating oil composition comprising a) an oil of lubricating viscosity having a viscosity index of at least 95; b) at least one calcium detergent; c) at least one oil soluble molybdenum compound; d) at least one organic ashless nitrogen-free friction modifier; and e) at least one metal dihydrocarbyldithiophosphate compound, the composition having a Noack volatility of about 15 wt. % or less, from 0.05 to 0.6 wt. % calcium from the calcium detergent, molybdenum in an amount of at least 10 ppm from the molybdenum compound, and phosphorus from the metal dihydrocarbyldithiophosphate compound in an amount up to about 0.1 wt. %.
Cooperative Patent Classification (CPC)
C10C10M2219/068C10N2020/02C10M