Make sure you add Fuel Additive to the engine and fuel system in your 2004.5-2007 Dodge 5.9L Cummins at every fill-up. In addition to additives that enhance lubricity and cetane, other additives are designed specifically for cold weather and to reduce fuel gelling and provide winter protection. Most additives are specially formulated to reduce smoke, improve engine performance, as well as clean fuel and engine components. Shop today and find the additives you need for your vehicle from XDP, Lucas Oil, FPPF, Hot Shot's Secret, Stanadyne, and more!