There is provided a lubricating composition including a lubricating base containing an asymmetric sulfurized oxymolybdenum dithiocarbamate of the formula (1); a symmetric sulfurized oxymolybdenum dithiocarbamate of the formula (2); and a phenolic or aminic antioxidant.
(wherein R1 to R5 are each a hydrocarbon group, provided that R1 to R4 are not concurrently the same group; and X1 to X8 are each a sulfur atom or an oxygen atom.)
This lubricating composition meets both the required solubility of additives in base oils and long drain properties concurrently.