Page 270 of 312

Choosing the right fuel
Use only UNLEADED FUEL. The use of leaded fuel is prohibited by law
and could damage your vehicle.
Your vehicle was not designed to use fuel or fuel additives with metallic
compounds, including manganese-based additives. Studies indicate that
these additives can cause your vehicle’s emission control system to
deteriorate more rapidly. In Canada, premium grade fuel generally
contains more metallic additives than regular fuel. We recommend using
regular grade fuel. In Canada, many fuels contain metallic additives, but
fuels free of such additives may be available; check with your local fuel
dealer.
Do not use fuel containing methanol. It can damage critical fuel system
components.
Repairs to correct the effects of using a fuel for which your vehicle was
not designed may not be covered by your warranty.
Octane recommendations
Your vehicle is designed to use
“Regular” unleaded gasoline with
pump (R+M)/2 octane rating of 87.
We do not recommend the use of
gasolines labeled as “Regular” that
are sold with octane ratings of 86 or lower in high altitude areas.
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.
Fuel quality
If you are experiencing starting, rough idle or hesitation driveability
problems, try a different brand of unleaded gasoline. “Premium”
unleaded gasoline is not recommended for vehicles designed to use
“Regular” unleaded gasoline because it may cause these problems to
become more pronounced. If the problems persist, see your authorized
dealer.
It should not be necessary to add any aftermarket 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 may not be covered by your warranty.
87(R+M)/2 METHOD
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
270
Page 305 of 312

A
Accessory delay ..........................58
Air cleaner filter .......283–284, 286
Air conditioning ..........................36
Airbag supplemental restraint
system ................................108–109
and child safety seats ............110
description ..............................109
disposal ....................................112
driver airbag ............................111
indicator light .........................112
operation .................................111
passenger airbag .....................111
passenger deactivation
switch ......................................113
Ambulance packages ....................8
Antifreeze
(see Engine coolant) ................260
Anti-lock brake system
(see Brakes) ......................172–173
Audio system
(see Radio) ................20, 22, 25, 28
Automatic transmission ............176
driving an automatic
overdrive .................................177
fluid, adding ............................279
fluid, checking ........................279
fluid, refill capacities ..............287
Auxiliary power point .................56
Axle
lubricant specifications ..........290
refill capacities ........................287
traction lok ..............................175
B
Battery .......................................258
acid, treating emergencies .....258jumping a disabled battery ....226
maintenance-free ....................258
replacement, specifications ...286
servicing ..................................258
BeltMinder .................................104
Brakes ........................................172
anti-lock ...........................172–173
anti-lock brake system (ABS)
warning light ...........................173
fluid, checking and adding ....278
fluid, refill capacities ..............287
fluid, specifications .................290
lubricant specifications ..........290
parking ....................................173
shift interlock ..........................176
trailer .......................................159
Break-in period .............................5
Bulbs ............................................45
C
Capacities for refilling fluids ....287
Cassette tape player .......20, 22, 25
Cell phone use ..............................7
Child safety restraints ..............118
child safety belts ....................118
Child safety seats ......................121
attaching with tether straps ..124
in front seat ............................122
in rear seat ..............................122
Cleaning your vehicle
engine compartment ..............242
instrument panel ....................244
interior .....................................245
interior trim ............................245
plastic parts ............................244
safety belts ..............................245
washing ....................................241
waxing .....................................241
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Index
305
Page 308 of 312

K
Keyless entry system .................86
Keys
positions of the ignition .........167
L
Lamps
autolamp system .......................39
daytime running light ...............40
fog lamps ...................................40
headlamps .................................39
headlamps, flash to pass ..........41
instrument panel, dimming .....41
interior lamps ...........................45
replacing bulbs ...................45–53
Lane change indicator
(see Turn signal) ........................44
Lights, warning and indicator ....12
anti-lock brakes (ABS) ..........173
speed control ............................63
Load limits .................................148
Loading instructions .................155
Locks
childproof ..................................81
Lubricant specifications ...........290
Lug nuts ....................................225
Lumbar support, seats ...............95
M
Manual transmission .................180
fluid capacities ........................287
reverse .....................................181
Message center .....................68–70
english/metric button ...............74
system check button ................73
warning messages .....................75Mirrors .........................................55
automatic dimming rearview
mirror ........................................58
fold away ...................................60
heated ........................................59
side view mirrors (power) .......58
signal .........................................59
Moon roof ....................................66
Motorcraft parts ................266, 286
O
Octane rating ............................270
Oil (see Engine oil) ..................254
Overdrive .....................................55
P
Parking brake ............................173
Parts (see Motorcraft parts) ....286
Pedals (see Power adjustable
foot pedals) .................................61
Power adjustable foot pedals .....61
Power distribution box
(see Fuses) ...............................211
Power door locks ........................80
Power mirrors .............................58
Power point .................................56
Power steering ..........................174
fluid, checking and adding ....277
fluid, refill capacity ................287
fluid, specifications .................290
Power Windows ...........................57
Preparing to drive your
vehicle ........................................175
R
Radio ..........................20, 22, 25, 28
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Index
308