2009 Jeep Grand Cherokee Owner's Manual - Page 362
2009 Jeep Grand Cherokee Manual
Page 362 highlights
360 STARTING AND OPERATING FUEL REQUIREMENTS (DIESEL ENGINES) NOTE: Federal law requires that you must fuel this vehicle with Ultra Low Sulfur Highway Diesel fuel (15 ppm Sulfur maximum) and prohibits the use of Low Sulfur Highway Diesel fuel (500 ppm Sulfur maximum) to avoid damage to the emissions control system. Use good quality diesel fuel from a reputable supplier. For most year-round service, No. 2 diesel fuel, meeting ASTM specification D-975 Grade S15, 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. This vehicle is fully-compatible with biodiesel blends up to 5% biodiesel, meeting ASTM specification D-975. 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. Ultra-Low Sulfur Diesel Fuel Label
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