2008 Jeep Grand Cherokee Owner's Manual - Page 344

344 STARTING AND OPERATING CAUTION! • Replacing fuel system components with nonethanol compatible components can damage your vehicle. • Do not use ethanol mixture greater than 85% in your vehicle. It will cause difficulty in cold starting and may affect drivability. 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. 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. FUEL REQUIREMENTS (DIESEL ENGINES) 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