Page 240 of 312
5. Locate and carefully remove the
engine oil level indicator (dipstick).
6. Wipe the indicator clean. Insert the indicator fully, then remove it
again.
•If the oil level isbetween the MIN and MAX marks,the oil level is
acceptable.DO NOT ADD OIL.
•If the oil level is below the MIN
mark, add enough oil to raise the
level within the MIN-MAX range.
•Oil levels above the MAX mark may cause engine damage. Some oil
must be removed from the engine by a service technician.
7. Put the indicator back in and ensure it is fully seated.
Adding engine oil
1. Check the engine oil. For instructions, refer toChecking the engine
oilin this chapter.
2. If the engine oil level is not within the normal range, add only certified
engine oil of the recommended viscosity. Remove the engine oil filler cap
and use a funnel to pour the engine oil into the opening.
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
240
Page 244 of 312

If the battery has been disconnected or a new battery has been installed,
the clock and the preset radio stations must be reset once the battery is
reconnected.
•Always dispose of automotive
batteries in a responsible manner.
Follow your local authorized
standards for disposal. Call your
local authorized recycling center
to find out more about recycling
automotive batteries.
ENGINE COOLANT
Checking engine coolant
The concentration and level of engine coolant should be checked at the
mileage intervals listed in theScheduled Maintenance Guide. The
coolant concentration should be maintained at 50/50 coolant and distilled
water, which equates to a freeze point of -34°F (-36°C). Coolant
concentration testing is possible with a hydrometer or antifreeze tester
(such as the Rotunda Battery and Antifreeze Tester, 014–R1060). The
level of coolant should be maintained at the“FULL COLD”level or
within the“COLD FILL RANGE”in the coolant reservoir. If the level falls
below, add coolant per the instructions in theAdding engine coolant
section.
Your vehicle was factory-filled with a 50/50 engine coolant and water
concentration. If the concentration of coolant falls below 40% or above
60%, the engine parts could become damaged or not work properly.A
50–50 mixture of coolant and water provides the following:
•Freeze protection down to -34°F (-36°C).
•Boiling protection up to 265°F (129°C).
•Protection against rust and other forms of corrosion.
•Enables calibrated gauges to work properly.
LEAD
RETURN
RECYCLE
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
244
Page 257 of 312

•Use recommended engine oil. Refer toLubricant specificationsin
this chapter.
•Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found in your vehicle scheduled maintenance guide.
Conditions
•Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
•Carrying unnecessary weight may reduce fuel economy (approximately
0.4 km/L [1 mpg] is lost for every 180 kg [400 lb] of weight carried).
•Adding certain accessories to your vehicle (for example bug
deflectors, rollbars/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
•Using fuel blended with alcohol may lower fuel economy.
•Fuel economy may decrease with lower temperatures during the first
12–16 km (8–10 miles) of driving.
•Driving on flat terrain offers improved fuel economy as compared to
driving on hilly terrain.
•Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the gas pedal.
•Four-wheel-drive operation (if equipped) is less fuel efficient than
two-wheel-drive operation.
•Close windows for high speed driving.
EPA window sticker
Every new vehicle should have the EPA window sticker. Contact your
dealer if the window sticker is not supplied with your vehicle. The EPA
window sticker should be your guide for the fuel economy comparisons
with other vehicles.
It is important to note the box in the lower left corner of the window
sticker. These numbers represent the Range of L/100 km (MPG)
expected on the vehicle under optimum conditions. Your fuel economy
may vary depending upon the method of operation and conditions.
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
257
Page 306 of 312

wheels ......................................230
wiper blades ............................231
Clock adjust
6-CD in dash .............................34
AM/FM .......................................21
AM/FM/CD .................................25
AM/FM/Tape ..............................22
AM/FM/Tape/CD .......................30
Clutch
fluid ..........................................261
operation while driving ..........140
recommended shift speeds ....140
Compass, electronic ....................71
calibration .................................72
set zone adjustment .................72
Console ........................................69
overhead ....................................54
Coolant
checking and adding ..............244
refill capacities ................248, 284
specifications ..................287, 291
Cruise control
(see Speed control) ....................61
Customer Assistance ................192
Ford accessories for your
vehicle .....................................234
Ford Extended Service
Plan ..........................................221
Getting assistance outside
the U.S. and Canada ..............225
Getting roadside assistance ...192
Getting the service you
need .........................................219
Ordering additional owner’s
literature .................................226
The Dispute Settlement
Board .......................................222
Utilizing the
Mediation/Arbitration
Program ...................................225D
Daytime running lamps
(see Lamps) ................................42
Dipstick
automatic transmission
fluid ..........................................262
engine oil .................................239
Doors
lubricant specifications ..........287
Driveline universal joint and
slip yoke ....................................266
Driving under special
conditions ..................139, 153, 156
sand .........................................155
snow and ice ...........................157
through water .................155, 160
E
Emergencies, roadside
jump-starting ..........................212
Emergency Flashers .................193
Emission control system ..........258
Engine ........................................291
cleaning ...................................230
coolant .....................................244
diesel ...........................................8
fail-safe coolant ......................248
idle speed control ...................242
lubrication
specifications ..................287, 291
refill capacities ........................284
service points ..........................238
starting after a collision .........193
Engine block heater .................129
Engine oil ..................................239
checking and adding ..............239
dipstick ....................................239
2004 F250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA English(fus)
Index
306