Make adding Fuel Additive to your 2011-2016 Chevy/GMC 6.6L LML Duramax part of your routine at every fill-up. Fuel additives are specially formulated to provide your engine with better performance, less smoke, and clean engine and fuel system components. Many fuel additives enhance lubricity and cetane while others are specifically designed for cold weather and to reduce diesel fuel from gelling in cold weather. Get the Fuel Additives your vehicle needs such as XDP, FPPF, Stanadyne, Lucas Oil, Hot Shot's Secret, Rev-X, and more!