| abstract |
(57) [Problem] To provide a lubricating composition capable of maintaining a friction reducing action (long drain effect) even after long-term use. SOLUTION: The present invention provides a lubricating base material comprising an organic molybdenum compound as a component (A) (however, excluding those corresponding to the component (B)) and a fatty acid or naphthenic acid as a component (B). Provided is a lubricating composition containing a reaction product of molybdenum or zinc alone. The organic molybdenum compound of the component (A) is preferably one of the following general formula (1), (2) or (3). Embedded image Embedded image R 9 —NH—R 10 (3) (wherein, R 1 to R 8 represent a hydrocarbon group, and R 9 and R 10 Represents a hydrogen atom or a hydrocarbon group, and X 1 to X 8 represent a sulfur atom or an oxygen atom. ) |