•YourService engine soonindicator may come on. For more
information on theService engine soonindicator, refer to the
Instrument clusterchapter.
ESSENTIALS OF GOOD FUEL ECONOMY
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend
taking fuel economy measurements during the first 1,000 miles (1,600 km)
of driving (engine break-in period). You will get a more accurate
measurement after 2,000 miles-3,000 miles (3,000 km–5,000 km).
Filling the tank
The advertised fuel capacity of the fuel tank on your vehicle is equal to
the rated refill capacity of the fuel tank as listed in theRefill capacities
section of this chapter.
The advertised capacity is the amount of the indicated capacity and the
empty reserve combined. Indicated capacity is the difference in the
amount of fuel in a full tank and a tank when the fuel gauge indicates
empty. Empty reserve is the small amount of fuel remaining in the fuel
tank after the fuel gauge indicates empty.
The amount of usable fuel in the empty reserve varies and should
not be relied upon to increase driving range. When refueling your
vehicle after the fuel gauge indicates empty, you might not be
able to refuel the full amount of the advertised capacity of the
fuel tank due to the empty reserve still present in the tank.
For consistent results when filling the fuel tank:
•Turn the engine/ignition off prior to refueling, an error in the reading
will result if the engine is left running.
•Use the same filling rate setting (low-medium-high) each time the
tank is filled.
•Allow no more than 2 automatic click-offs when filling.
•Always use fuel with the recommended octane rating.
•Use a known quality gasoline, preferably a national brand.
•Use the same side of the same pump and have the vehicle facing the
same direction each time you fill up.
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
271
FluidFord Part
NameApplication Capacity
Engine oil
(includes filter
change) - gas
engines
6
Motorcraft SAE
5W-20 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-20 Super
Premium Motor
Oil (Canada)5.4L V8 and
6.8L V10
engines7.0 quarts
(6.6L)
Engine oil
(includes filter
change) - diesel
engineRefer to your6.0 Liter Power Stroke Direct
Injection Turbo Diesel Owner’s Guide Supplement
Fuel tank N/A Mid-ship tank
(optional on
Chassis Cab)19.0 gallons
(71.9L )
Short box 30.5 gallons
(115.5L)
Long box 38.0 gallons
(143.9L)
Aft axle 40.0 gallons
(151.4L)
Power steering
fluidMotorcraft
MERCONAT FAll Fill to FULL
COLD range on
dipstick
Transfer case
fluidMotorcraft
MERCONAT F4x4 vehicles 2.0 quarts
(1.9L)
Manual
transmission
fluidMotorcraft
MERCONAT F6-speed manual 5.8 quarts
(5.5L)
4
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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