LUBRICATING OIL COMPOSITIONS COMPRISING MOLYBDENUM COMPOUND AND ZINC DIALKYLDITHIOPHOSPHATE

摘要

PROBLEM TO BE SOLVED: To provide lubricating oil compositions that provide an improved friction reduction.SOLUTION: Oil compositions are provided which comprise: a major amount of a base oil; at least one oil-soluble molybdenum compound; and a zinc dialkyldithiophosphate compound, where the molybdenum content derived from the molybdenum compound is at least 10 ppm based on the total weight of the lubricating oil composition, and the phosphorus content derived from the zinc dialkyldithiophosphate compound is about 200 to 500 ppm based on the total weight of the lubricating oil composition. The lubricating oil composition can further comprise at least one additive. Methods of making and using the lubricating oil compositions are also described.