Patent ID: 8415282

Claim:
A lubricating oil composition, comprising: a base oil for lubricating oil; (A) at least one species selected from metal salts and amine salts of phosphorus compounds represented by the following General Formula (1) or (2) excluding molybdenum salts; and (B) an organic molybdenum compound not containing sulfur as a constituent element; and (C) a metallic cleanser; the mass ratio M/Mo being from 10 to 40, wherein M represents metal contained in the metallic cleanser and Mo represents molybdenum contained in the organic molybdenum compound wherein R 1 represents a hydrocarbon group having 1 to 30 carbons, R 2 and R 3 may be identical or different, each representing a hydrogen atom or a hydrocarbon group having 1 to 30 carbons, X 1 , X 2 and X 3 may be identical or different, each representing an oxygen atom or a sulfur atom, and n represents 0 or 1, at least one of X 2 and X 3 representing an oxygen atom when n represents 0, and at least one of X 1 , X 2 and X 3 representing an oxygen atom when n represents 1, wherein R 4 represents a hydrocarbon group having 1 to 30 carbons, R 5 and R 6 may be identical or different, each representing a hydrogen atom or a hydrocarbon group having 1 to 30 carbons, X 4 , X 5 , X 6 and X 7 may be identical or different, each representing an oxygen atom or a sulfur atom, and n represents 0 or 1, at least two of X 5 , X 6 and X 7 representing oxygen atoms when n represents 0, and at least three of X 4 , X 5 , X 6 and X 7 representing oxygen atoms when n represents 1.