2009 Dodge Ram 1500 Pickup Owner Manual - Page 462

460 MAINTAINING YOUR VEHICLE CAUTION! (Continued) • Do not use water alone or alcohol-based engine coolant (antifreeze) products. Do not use additional rust inhibitors or antirust products, as they may not be compatible with the engine coolant (antifreeze) and may plug the radiator. • This vehicle has not been designed for use with Propylene Glycol based engine coolant (antifreeze). Use of Propylene Glycol based engine coolant (antifreeze) is not recommended. Please review these recommendations for using Hybrid Organic Additive Technology (HOAT) engine coolant (antifreeze). When adding engine coolant (antifreeze): • The manufacturer recommends using MOPAR௡ Antifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid Organic Additive Technology). • Mix a minimum solution of 50% HOAT engine coolant (antifreeze) and distilled water. Use higher concentrations (not to exceed 70%) if temperatures below -34°F (-37°C) are anticipated. Adding Coolant Your vehicle has been built with an improved engine • Use only high purity water such as distilled or deioncoolant (antifreeze) that allows extended maintenance ized water when mixing the water/engine coolant intervals. This engine coolant (antifreeze) can be used up (antifreeze) solution. The use of lower quality water to 5 Years or 102,000 miles (170 000 km) before replacewill reduce the amount of corrosion protection in the ment. To prevent reducing this extended maintenance engine cooling system. period, it is important that you use the same engine coolant (antifreeze) throughout the life of your vehicle.