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
When filling the vehicle’s fuel tank from a portable fuel container, use the funnel included with the vehicle.
1. Locate the white plastic funnel in the spare tire compartment.

2. To open the fuel filler door, press the center of the rear edge and then release.

3. Slowly insert the funnel into the capless fuel system.
4. Fill the vehicle with fuel from the portable fuel container.
5. When done, clean the funnel or properly dispose of it. Extra funnels can be purchased from your authorized dealer if you choose to dispose of the funnel.
Test yourself
A quick Ford Mustang quiz: every answer comes with an explanation and a link to the manual page.