2013 Ford Focus Owner Manual Printing 3 - Page 172

Fuel and Refueling Octane Recommendations 171 Regular unleaded gasoline with a pump (R+M)/2 octane rating of 87 is recommended. Some stations offer fuels posted as Regular with (R+M)/2 METHOD an octane rating below 87, particularly in high altitude areas. Do not use fuels with a posted octane rating below 87. Do not be concerned if your engine sometimes knocks lightly. However, if it knocks heavily under most driving conditions while you are using fuel with the recommended octane rating, see your authorized dealer to prevent any engine damage. 87 RUNNING OUT OF FUEL Avoid running out of fuel because this situation may have an adverse effect on powertrain components. If you have run out of fuel: • You may need to cycle the ignition from off to on several times after refueling to allow the fuel system to pump the fuel from the tank to the engine. On restarting, crank time will be a few seconds longer than normal. With keyless ignition, just start the engine. Crank time will be longer than usual. • Normally, adding 1 gallon (3.8 liters) of fuel is enough to restart the engine. If the vehicle is out of fuel and on a steep grade, more than 1 gallon (3.8 liters) may be required. • The service engine soon indicator may come on. For more information on the service engine soon indicator, see Warning Lamps and Indicators in the Instrument Cluster chapter. Refilling with a Portable Fuel Container WARNING: Do not insert the nozzle of a portable fuel container or aftermarket funnel into the capless fuel system. This could damage the fuel system and its seal, and may cause fuel to run onto the ground instead of filling the tank, which could result in serious personal injury. WARNING: Do not try to pry open or push open the capless fuel system with foreign objects. This could damage the fuel system and its seal and cause injury to you or others. 2013 Focus (foc) Owners Guide gf, 3rd Printing, November 2012 USA (fus)