FORD 2003 F-550 v.1 - Manual (Page 209)

in the United States) because it maycause these problems to become
more pronounced. If the problems persist, see your dealer or a qualified
service technician.
It should not be necessaryto add anyaftermarket products to your fuel
tank if you continue to use high quality fuel of the recommended octane
rating. Aftermarket products could cause damage to the fuel system.
Repairs to correct the effects of using an aftermarket product in your
fuel maynot be covered byyour warranty.
Manyof the world’s automakers
issued the World-wide Fuel Charter
that recommends gasoline
specifications to provide improved
performance and emission control
system protection for your vehicle.
Gasolines that meet the World-wide
Fuel Charter should be used when
available. Ask your fuel supplier
about gasolines that meet the
World-wide Fuel Charter. In Canada,
look for fuels that displaythe Auto Makers’ Choice
௢ logo.
Cleaner air
Ford endorses the use of reformulated “cleaner-burning” gasolines to
improve air quality.
Running out of fuel
Avoid running out of fuel because this situation mayhave an adverse
affect on powertrain components.
If you have run out of fuel:
• You mayneed 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.
• Your “Service Engine Soon” indicator maycome on. For more
information on the “Service Engine Soon” indicator, refer to the
Instrument cluster chapter.
Fuel Filter
For fuel filter replacement, see your dealer or a qualified service
technician. Refer to the scheduled maintenance guide for the appropriate
intervals for changing the fuel filter.
Maintenance and Specifications
209