| abstract |
The lubricating oil composition of the present invention comprises at least one species of aromatic constituent selected from the following (a1) to (a5): n(a1) a lubricating base oil comprising a polycyclic aromatic content of 0.01 % by mass or more based on the total amount of base oil n(a2) a lubricating base oil comprising a total aromatic content of 20 to 100 % by mass based on the total amount of base oil n(a3) an aromatic solvent n(a4) at least one species of polycyclic aromatic compound selected from alkyl naphthalene and compounds having three or more aromatic rings, and n(a5) an aromatic compound having a nitrogen atom, an oxygen atom or a sulfur atom; n nand an organic molybdenum compound. |