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Calculating fuel economy
1. Fill the fuel tank completely and record the initial odometer reading
(in miles or kilometers).
2. Each time you fill the tank, record the amount of fuel added (in
gallons or liters).
3. After at least three to five tank fill-ups, fill the fuel tank and record
the current odometer reading.
4. Subtract your initial odometer reading from the current odometer
reading.
5. Follow one of the simple calculations in order to determine fuel
economy:
Calculation 1:Divide total miles traveled by total gallons used.
Calculation 2:Multiply liters used by 100, then divide by total
kilometers traveled.
Keep a record for at least one month and record the type of driving (city
or highway). This will provide an accurate estimate of the vehicle’s fuel
economy under current driving conditions. Additionally, keeping records
during summer and winter will show how temperature impacts fuel
economy. In general, lower temperatures give lower fuel economy.
Driving style — good driving and fuel economy habits
Give consideration to the lists that follow and you may be able to change
a number of variables and improve your fuel economy.
Habits
•Smooth, moderate operation can yield up to 10% savings in fuel.
•Steady speeds without stopping will usually give the best fuel
economy.
•Idling for long periods of time (greater than one minute) may waste
fuel.
•Anticipate stopping; slowing down may eliminate the need to stop.
•Sudden or hard accelerations may reduce fuel economy.
•Slow down gradually.
•Driving at reasonable speeds (traveling at 55 mph [88 km/h] uses 15%
less fuel than traveling at 65 mph [105 km/h]).
•Revving the engine before turning it off may reduce fuel economy.
•Using the air conditioner or defroster may reduce fuel economy.
Maintenance and Specifications
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Owners Guide, 4th Printing
USA(fus)
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Lifestyle
•Ash cup / smoker’s package•Racks and carriers*
•Bedliners and bedmats•Truck bed camping tent*
•Subwoofer*•Sportliner cargo liner*
•Towing mirrors•Trailer hitch balls*
•Navigation*•Rear seat entertainment*
•Tonneau covers*
•Trailer hitches, wiring harnesses and accessories
Peace of mind
•Keyless entry keypad•Back up camera*
•Remote start•Back up alarm*
•Vehicle security systems•Cable lock*
•Wheel locks•Bed hooks*
•Vehicle tracking and recovery*•Tool/Cargo boxes*
•Protective seat covers*
•Bumper and hitch mounted parking sensors*
Not all accessories are available for all models.
*Ford Licensed Accessories (FLA) are warranted by the accessory
manufacturer’s warranty. Ford Licensed Accessories are fully designed
and developed by the accessory manufacturer and have not been
designed or tested to Ford Motor Company engineering requirements.
Contact your Ford dealer for details regarding the manufacturer’s limited
warranty and/or a copy of the FLA product limited warranty offered by
the accessory manufacturer.
For maximum vehicle performance, keep the following information in
mind when adding accessories or equipment to your vehicle:
•When adding accessories, equipment, passengers and luggage to your
vehicle, do not exceed the total weight capacity of the vehicle or of
the front or rear axle (GVWR or GAWR as indicated on the Safety
Compliance Certification Label). Consult your authorized dealer for
specific weight information.
Accessories
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Owners Guide, 4th Printing
USA(fus)
Page 445 of 449

Engine oil ..................................371
checking and adding ..............371
dipstick ....................................371
filter, specifications ........372, 406
recommendations ...................372
refill capacities ........................407
Event data recording ....................9
Exhaust fumes ..........................265
F
Fail safe cooling ........................379
Fleet MyKey programming ......127
Flexible Fuel Vehicle (FFV) ....382
Floor mats .................................121
Fluid capacities .........................407
Fog lamps ....................................87
Four-Wheel Drive vehicles .......296
driving off road .......................303
electronic shift ................297, 301
indicator light .........................298
lever operated shift ................298
manual locking hubs ..............297
preparing to drive your
vehicle .....................................281
Fuel ............................................382
calculating fuel
economy ............................25, 389
cap ...........................................385
capacity ...................................407
choosing the right fuel ...........386
detergent in fuel .....................388
filling your vehicle with
fuel ...........................382, 385, 389
filter, specifications ........382, 406
fuel pump shut-off ..................316
improving fuel economy ........389
octane rating ...........386–387, 411
quality ......................................387running out of fuel .................388
safety information relating to
automotive fuels .....................382
Fuel - flex fuel vehicle
(FFV) .........................382, 386–387
Fuses ..................................316–317
G
Garage door opener ..................114
Gas cap (see Fuel cap) ............385
Gas mileage (see Fuel
economy) ...................................389
Gauges .........................................21
H
Hazard flashers .........................315
Headlamps ...................................86
aiming ..................................88–89
autolamp system .......................86
daytime running lights .............88
flash to pass ..............................87
high beam .................................87
replacing bulbs .........................93
turning on and off ....................86
Heating
heating and air conditioning
system .................................77, 80
Hill descent mode .....................277
Hill start assist ..........................291
Hood ..........................................367
I
Ignition ...............................262, 411
Illuminated visor mirror .............98
Index
445
2011 F-250/350/450/550(f23)
Owners Guide, 4th Printing
USA(fus)