Shell Rotella T 1-Gallon 15W40 CJ4 Motor Oil. It is a premium quality, Heavy-duty multi grade oil suitable for all season use in diesel powered or a mix of gasoline & diesel powered equipment. It offers advanced soot control, protecting engines against wear and extending their life. Suitable for a variety of vehicles, including passenger cars, light trucks, fork lifts, and farm equipment, this oil meets or exceeds the warranty and service requirements of virtually all diesel and gasoline engine manufacturers.