| abstract |
The use, in a minor amount, of a detergent composition comprisingn (I) a metal salt of a phenol, or (II) both a metal salt of an aromatic carboxylic acid and a metalnsalt of a phenol, nin a lubricating oil composition for improving the oxidation resistance of thenlubricating oil composition, wherein the amount of phosphorus and sulfur in the oilncomposition is less than 0.09 mass % and at most 0.5 mass % respectively,nbased on the mass of the oil composition. |