What to Use{ CAUTION:Adding only plain water to the cooling system canbe dangerous. Plain water, or some other liquidsuch as alcohol, can boil before the proper coolantmixture will. The vehicle’s coolant warning systemis set for the proper coolant mixture. With plainwater or the wrong mixture, the engine could gettoo hot but you would not get the overheatwarning. The engine could catch fire and you orothers could be burned. Use a 50/50 mixture ofclean, drinkable water and DEX-COOL® coolant.Use a 50/50 mixture of clean, drinkable water andDEX-COOL ® coolant. If using this mixture, nothing elseneeds to be added. This mixture:• Gives freezing protection down to −34°F (−37°C),outside temperature.• Gives boiling protection up to 265°F (129°C),engine temperature.• Protects against rust and corrosion.• Will not damage aluminum parts.• Helps keep the proper engine temperature.Notice: If an improper coolant mixture is used, theengine could overheat and be badly damaged. Therepair cost would not be covered by the vehiclewarranty. Too much water in the mixture can freezeand crack the engine, radiator, heater core, and otherparts.Notice: If extra inhibitors and/or additives are usedin the vehicle’s cooling system, the vehicle couldbe damaged. Use only the proper mixture ofthe engine coolant listed in this manual for thecooling system. See Recommended Fluids andLubricants on page 6-11 for more information.5-24