2014 Ford F350 Super Duty Super Cab Quick Reference Guide Printing 2 - Page 17

Essential Information Diesel Exhaust Fluid (DEF) Level To help reduce emission levels from the exhaust of the diesel engine, your vehicle is equipped with a Selective Catalytic Reduction (SCR) system that relies upon Diesel Exhaust Fluid (DEF) to operate properly. The SCR automatically injects DEF into the exhaust system to enable proper SCR function. Make sure that you check your vehicle's DEF level during the oil change service interval, but certain conditions or driving styles, such as trailer towing or fast rates of acceleration, will require the refilling of the DEF tank more often. See the scheduled maintenance information in your Diesel Supplement for more information. Fuel Type/Tank Capacity/Flex Fuel* Depending on your vehicle, your fuel tank size varies based on body style and/or engine configuration. Refer to the Capacities and Specifications section in your Owner's Manual for more details. Diesel fuel recommendations Ford recommends that you use only the diesel fuels that meet either the ASTM D975 diesel or the ASTM D7467 B6-B20 biodiesel industry specifications. Outside of North America, use fuels meeting EN590 or equivalent local market standard. Diesel fuel is adjusted seasonally for colder temperatures. For best results at temperatures below 20°F (-7°C), it is recommended to use a diesel fuel that has been seasonally adjusted for ambient conditions. Flex fuel vehicles have a yellow ring around the top of the fuel filler inlet (tube) and can use either regular unleaded fuel or E85 ethanol fuel. It is best not to alternate repeatedly between gasoline and E85. If you do switch fuels, it is recommended that you add as much fuel as possible-at least half a tank. Do not add less than 5 gallons (18.9 liters) when refueling. You should drive the vehicle immediately after refueling for at least 5 miles (8 km) to allow the vehicle to adapt to the change in ethanol concentration. If you exclusively use E85 fuel, it is recommended to fill the fuel tank with regular unleaded gasoline at each scheduled oil change. If you do not have a flex fuel vehicle, then only use "Regular" unleaded gasoline with an octane rating of 87. Do not use E85 fuels, because your vehicle was not designed to run on fuels with more than 15% ethanol. Diesel exhaust system The Diesel Particulate Filter (DPF) system helps reduce carbon emissions. This system requires the completion of periodic drives to clean or an operatorcommanded regeneration procedure that is prompted through your information display. Failure to comply with the required cleaning procedure maintenance can result in damage to the DPF system that may not be covered under your warranty. See your Diesel Supplement for more information. 16 *if equipped