2008 Chrysler Crossfire Owner Manual - Page 284

282 MAINTAINING YOUR VEHICLE CAUTION! Failure to use the proper antifreeze could cause radiator plugging and engine overheating. Do not mix antifreeze brands or types. Do not use plain water alone or alcohol base antifreeze products. Do not use additional rust inhibitors or antirust products, as they may not be compatible with the radiator coolant and may plug the radiator. Adding Coolant When adding coolant, a minimum solution of 50% ethylene glycol antifreeze coolant and water should be used. Use higher concentrations (not to exceed 70%) if temperatures below -34°F (-37°C) are anticipated. Use only high purity water, such as distilled or deionized water when mixing the water/antifreeze solution. The use of lower quality water will reduce the amount of corrosion protection in the engine cooling system. NOTE: Mixing coolant types other than Mopar௡ products will decrease the life of the engine coolant and will require more frequent coolant changes. Please note that it is the owner's responsibility to maintain the proper level of protection against freezing, according to the temperatures occurring in the area where the vehicle is operated. Cooling System Pressure Cap The cap must be fully tightened to prevent loss of coolant, and to ensure that coolant will return to the radiator from the coolant reserve tank. The cap should be inspected and cleaned if there is any accumulation of foreign material on the sealing surfaces.