2007 Dodge Ram 2500 Pickup Owner Manual Diesel - Page 318

318 STARTING AND OPERATING FUEL REQUIREMENTS (DIESEL ENGINES) Use good quality diesel fuel from a reputable supplier in your Dodge truck. For most year-round service, No. 2 diesel fuel meeting ASTM specification D-975 will provide good performance. If the vehicle is exposed to extreme cold (below 20°F or -7°C), or is required to operate at colder-than-normal conditions for prolonged periods, use climatized No. 2 diesel fuel or dilute the No. 2 diesel fuel with 50% No. 1 diesel fuel. This will provide better protection from fuel gelling or wax-plugging of the fuel filters. Diesel fuel is seldom completely free of water. To prevent fuel system trouble, drain the accumulated water from the fuel/water separator using the fuel/ water separator drain provided. Use an approved fuel container to catch drainage and dispose of per local and governmental regulations. If you buy good quality fuel and follow the cold weather advice above, fuel conditioners should not be required in your vehicle. If available in your area, a high cetane "premium" diesel fuel may offer improved cold-starting and warm-up performance. Fuel Specifications The Cummins Turbocharged, Charge Air Cooled, Diesel engine has been developed to take advantage of the high energy content and generally lower cost No. 2 diesel fuel or No. 2 climatized diesel fuels. Experience has shown that it also operates on No. 1 diesel fuels or other fuels within the specifications in the following chart. WARNING! Do not use alcohol or gasoline as a fuel blending agent. They can be unstable under certain conditions and hazardous or explosive when mixed with diesel fuel.