Top off the radiator in your 1994-1998 Dodge 5.9L Diesel with the Coolant & Additives available. In addition to full synthetic antifreezes, you can also get additional additives that provide you with a coolant service life of 150,000 to 750,000 miles. In addition to reducing surface tension for more effective cooling, these additives also offer faster warm-up times, corrosion prevention, and lower engine temperatures. Top manufactures like DEI, Royal Purple, Mishimoto, Evans, Hot Shot's Secret, XDP, and Lucas Oil are offered by XDP.