Lubricating oil composition
AssigneeInfineum International Limited
InventorsRolfe J. Hartley, Malcolm Waddoups
Life of this patent
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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. %.
Claims22
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 dihydrocarbyl dithiophosphate compound, wherein said composition has a Noack volatility of about 15 wt. % or less, from about 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 dihydrocarbyl dithiophosphate compound in an amount up to about 0.1 wt. %.
Dependencies are inferred from the claim text.