Lubricating oil composition
AssigneeInfineum International Limited
InventorsRolfe J. Hartley, Malcolm Waddoups
Life of this patent
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Abstract
Lubricating oil compositions exhibititing improved low temperature valve train wear performance with a lowered phosphorus content, which contain a reduced amount of a metal hydrocarbyl dithiophosphate, a molybdenum compound, a metal-free friction modifier and a phosphorus-free antioxidant.
Claims19
A lubricating oil composition comprising a major amount of oil of lubricating viscosity, an oil soluble molybdenum compound in an amount providing from about 50 ppm to about 350 ppm, by mass, of molybdenum to said composition, an amount of metal hydrocarbyl dithiophosphate providing said composition with no more than 600 ppm, by mass, of phosphorus, an effective amount of at least one metal-free friction modifier and an effective amount of at least one phosphorus-free antioxidant.
A lubricating oil concentrate comprising oil of lubricating viscosity, an oil soluble molybdenum compound in an amount providing from about 50 ppm to about 350 ppm, by mass, of molybdenum to a fully formulated oil, metal hydrocarbyl dithiophosphate in an amount providing said fully formulated oil with no more than 600 ppm, by mass, of phosphorus, a metal-free friction modifier and a phosphorus-free antioxidant.
Dependencies are inferred from the claim text.