Methods and compositions for reducing wear in internal combustion engines lubricated with a low phosphorus content lubricating oil
AssigneeChevron Oronite Company LLC
InventorAlexander B. Boffa
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Abstract
Disclosed are methods and lubricant compositions for reducing wear in internal combustion engines lubricated with a low phosphorus content lubricating oil. The lubricant compositions of this invention comprise a synergistic combination of a complex of a molybdenum/nitrogen containing compound and at least one phosphorus-containing compound wherein the total phosphorus employed in the composition is no more than about 0.06 weight percent based on the total weight of the composition.
Claims24
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity,
- at least one oil-soluble, phosphorus-containing, anti-wear compound wherein the weight percent of total phosphorus in the composition is no more than about 0.06 weight percent based on the total weight of the composition;
- and
- an anti-wear effective amount of a molybdenum/nitrogen-containing complex.
A method for controlling wear during operation of an internal combustion engine which engine is lubricated with a lubricant composition comprising a major amount of an oil of lubricating viscosity and at least one phosphorus containing compound wherein the weight percent of total phosphorus in the composition is no more than about 0.06 weight percent based on the total weight of the composition wherein said method comprises combining into said composition an anti-wear effective amount of a molybdenum/nitrogen-containing complex.
Dependencies are inferred from the claim text.