Add Fuel Additive to your 1982-2000 Chevy/GMC 6.2L/6.5L Diesel every time you fuel up. While additives are designed to enhance fuel system performance, other additives are available specifically for cold weather and to reduce fuel gelling while providing protection in the winter. Most additives are specially formulated to reduce smoke, improve engine performance, as well as clean fuel and engine components. Find the additives you need in your vehicle from the top brands like FPPF, Hot Shot's Secret, Lucas Oil, XDP, and more!