Give your 2017-2019 Chevy/GMC 6.6L L5P Duramax the Coolant & Additives it needs to stay on the road. You can find engine coolant and additives that offer 150,000 to 750,000-mile service life. With the help of these additives, cooling systems will operate more effectively, corrosion will be prevented, warm-up times will be shortened, and engine temperatures will drop. Evans, Hot Shot's Secret, XDP, Lucas Oil, DEI, Royal Purple, and Mishimoto are just some of the top manufacturers available at XDP.