MAG 1All Fleet 15W-40 Engine Oil is built for all heavy duty diesel and gasolineengines that require a CJ-4 or CI-4+ rated oil. It delivers reliable performance over a wide range of temperatures, and the superior anti-wear agents extend the engine's life, even if operating temperatures are high or you're slacking and not changing your oil as often as you should. | MAG1 15W-40 Engine Oil | Size 1 gal