Marine Diesel Cylinder Lubricants for Fuel Efficiency
AssigneeThe Lubrizol Corporation
InventorsStephen J. Cook, Alexandra Mayhew
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Abstract
A lubricant composition comprising an oil of lubricating viscosity and 0.01 to 5 percent by weight of an organic friction modifier, said lubricant composition being substantially free from molybdenum compounds, is suitable for lubricating an internal combustion engine operating at above 150° C. at the cylinder liner, for example, a marine diesel engine.
Claims11
1-14. (canceled)
A method for lubricating a marine diesel engine operating above 150° C. at the cylinder liner, comprising supplying to the cylinder liner thereof and not to or from a crankcase, a lubricant composition comprising an oil of lubricating viscosity and 0.01 to 5 percent by weight of an organic friction modifier comprising an acid or acid derivative selected from the group consisting of fatty acids;
- metal salts of fatty acids;
- fatty acid imidazolines;
- and hydroxy-carboxylic acid di-esters, di-amides, ester-amides, or imides;
- said fatty acids containing 6 to 24 carbon atoms;
- said lubricant composition being substantially free from molybdenum compounds and substantially free from zinc dialkyldithiophosphates.
Dependencies are inferred from the claim text.