LONG-LIFE FUEL-SAVING ENGINE OIL COMPOSITION

摘要

A long-life fuel-saving engine oil composition which comprises a mineral and/or synthetic base oil; an amine antioxidant and a phenolic antioxidant added to the oil in a total amount of 1.2 mass% or larger in which the ratio of the mass amount of nitrogen (N) contained in the amine antioxidant to the mass amount of oxygen (O) contained in the phenolic antioxidant, (N/O), is 0.20-0.50; and MoDTC incorporated in an amount of 0.055 mass% or larger in terms of molybdenum amount. The long-life fuel-saving engine oil composition has excellent oxidative stability at high temperatures and retains low-frictional properties over long.