Give your 2011-2016 Chevy/GMC 6.6L LML Duramax the Coolant & Additives it needs to stay on the road. These additives will minimize surface tension for more efficient cooling, prevent corrosion, offer faster warm-ups, and reduce engine temperatures. You'll find full synthetic and conventional antifreeze with supplemental additives that offer 150,000 to 750,000-mile service life. Evans, Hot Shot's Secret, XDP, Lucas Oil, DEI, Royal Purple, and Mishimoto are just some of the top manufacturers available at XDP.