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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 1,600 km (1,000
miles) of driving (engine break-in period). You will get a more accurate
measurement after 3,000 km–5,000 km (2,000 miles-3,000 miles).
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 switch to the off position 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.
•Have the vehicle loading and distribution the same every time.
Your results will be most accurate if your filling method is consistent.
Calculating fuel economy
1. Fill the fuel tank completely and record the initial odometer reading
(in kilometers or miles).
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Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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Page 220 of 240

Fluid Ford Part Name Application Capacity
Fuel tank N/A All regular and
extended length
vans and wagons132.4L (35.0
gallons)
138 inch
wheelbase (except
E-Super Duty)140.0L (37.0
gallons)
158 inch
wheelbase (except
E-Super Duty)140.0L (37.0
gallons)
5
176 inch
wheelbase (except
E-Super Duty)140.0L (37.0
gallons)
158 inch and 176
inch wheelbase
(E-Super Duty)208.0L (55 .0
gallons)
Transmission
fluid
6Motorcraft
MERCONVATFAutomatic
(4R70/75 E-W)13.2L (13.9
quarts)7
Motorcraft MERCON
AT FAutomatic (4R100
except E-450)16.1L (17.0
quarts)7
Automatic (4R100
E-450)16.7L (17.7
quarts)7
Windshield
washer fluidMotorcraft Premium
Windshield Washer
ConcentrateAll 4.0L (4.2
quarts)
1Add the coolant type originally equipped in your vehicle.2If your vehicle’s rear axle is filled with a synthetic rear axle lubricant it
is considered lubricated for life. These lubricants do not need to be
checked or changed unless a leak is suspected, service is required or the
axle assembly has been submerged in water. The axle lubricant should
be changed any time the rear axle has been submerged in water.
Fill 6 mm to 14 mm (1/4 inch to 9/16 inch) below bottom of fill hole.
Add 118 ml (4 oz.) of Additive Friction Modifier XL-3 or equivalent
meeting Ford specification EST-M2C118–A, for complete refill of 8.8 inch
and 9.75 inch Traction-Lok axles.
3Fill Dana rear axles to 6 mm to 19 mm (1/4 inch to 3/4 inch) below
bottom of fill hole. Fill Visteon axles 6 mm to 14 mm (1/4 inch to 9/16
inch) below bottom of fill hole.
4Visteon Traction-Lok axles require 118 ml (4 oz.) of Additive Friction
Modifier XL—3 or equivalent meeting Ford specification EST-M2C118–A.
Dana limited-slip axles (E250/350/450/550) require 237ml (8 oz.) of
Additive Friction Modifier C8AZ—19B546–A or equivalent meeting Ford
specification EST-M2C118-A.
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Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
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5Optional fuel tank 208L (55 gallon).
6Ensure the correct automatic transmission fluid is used. Transmission
fluid requirements are indicated on the dipstick or on the dipstick
handle. Check the container to verify the fluid being added is of the
correct type. Refer to your scheduled maintenance guide to determine
the correct service interval.
Some transmission fluids may be labeled as dual usage, such as
MERCONand MERCONV. These dual usage fluids are not to be used
in an automatic transmission that requires use of the MERCONtype
fluid. However, these dual usage fluids may be used in transmissions that
require the MERCONV type fluid.
MERCONand MERCONV type fluids are not interchangeable.
DO NOT mix MERCONand MERCONV. Use of a transmission
fluid that indicates dual usage (MERCONand MERCONV) in
an automatic transmission application requiring MERCONmay
cause transmission damage. Use of any fluid other than the
recommended fluid may cause transmission damage.
7Approximate dry fill capacity including transmission fluid cooling
system, actual refill capacities will vary based on vehicle application and
transmission fluid cooling system (i.e. coolers size, cooling lines. auxiliary
cooler capacities). The amount of transmission fluid and fluid level
should be set by the indication on the dipstick’s normal operating range.
8If your vehicle is equipped with a single row radiator, there will be a
label on the top side of the radiator indicating“1 Row Radiator”.
9Use of synthetic or synthetic blend motor oil is not mandatory. Engine
oil need only meet the requirements of Ford specification
WSS-M2C153–H and the API Certification mark.
2004 Econoline(eco)
Owners Guide (post-2002-fmt)
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Maintenance and Specifications
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