Page 195 of 666

Dual Fuel Tanks (If Equipped)
Your vehicle may have a dual fuel tank
delivery system which operates
independently and automatically. The fuel
pump in the front fuel tank delivers fuel to
the engine. When the fuel level in the front
fuel tank drops below three quarter full,
fuel automatically transfers from the rear
fuel tank to the front fuel tank. Whenever
there is fuel in the rear fuel tank, the front
fuel tank level remains between half and
three quarter full.
Note: If your vehicle runs out of fuel, you
must add fuel to the front fuel tank to
restart the engine.
FUEL CONSUMPTION
Advertised Capacity
The advertised capacity is the maximum
amount of fuel that you can add to the fuel
tank after running out of fuel. Included in
the advertised capacity is an empty
reserve. The empty reserve is an
unspecified amount of fuel that remains
in the fuel tank when the fuel gauge
indicates empty.
Note: The amount of fuel in the empty
reserve varies and should not be relied upon
to increase driving range.
Fuel Economy
Your vehicle calculates fuel economy
figures through the trip computer average
fuel function. See
General Information
(page 112).
The first
1,000 mi (1,500 km) of driving is
the break-in period of the engine. A more
accurate measurement is obtained after
2,000 mi (3,000 km)
. Impacting Fuel Economy
•
Incorrect tire inflation pressures.
• Fully loading your vehicle.
• Carrying unnecessary weight.
• Adding certain accessories to your
vehicle such as bug deflectors, rollbars
or light bars, running boards and ski
racks.
• Using fuel blended with alcohol. See
Fuel Quality
(page 184).
• Fuel economy may decrease with lower
temperatures.
• Fuel economy may decrease when
driving short distances.
• You may get better fuel economy when
driving on flat terrain than when driving
on hilly terrain.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201804, Fourth-Printing Fuel and Refueling
Page 429 of 666

CAPACITIES AND SPECIFICATIONS - 6.2L
Capacities
WARNING: The air conditioning refrigerant system contains refrigerant under
high pressure. Only qualified personnel should service the air conditioning refrigerant
system. Opening the air conditioning refrigerant system can cause personal injury. Capacity
Item
7.0 qt (6.6 L)
Engine oil (with oil filter).
21.3 qt (20.2 L)
Engine coolant.
Between MIN and MAX on brake fluidreservoir
Brake fluid.
2.7 qt (2.6 L)
Front axle.
3.3–3.5 qt (3.1– 3.3 L)
Rear axle-10.5 inch with Electronic Locking
Differential.
3.5–3.6 qt (3.3– 3.4 L)
Rear axle-10.5 inch without Electronic
Locking Differential.
3.78 qt (3.58 L)1
Rear axle-Dana M300.
13.9 qt (13.2 L)2
Automatic transmission fluid (6R100).
17.4 qt (16.5 L)2
Automatic transmission fluid (6R140).
1.9 qt (1.8 L)
Transfer case fluid.
Fill as required
Windshield washer fluid.
26.5 gal (100.3 L)
Fuel tank (incomplete vehicle, middle
location).
34.0 gal (128.7 L)
Fuel tank (All except 176 inch wheelbase
and incomplete vehicles).
48.0 gal (181.7 L)
Fuel tank (176 inch wheelbase).
40 gal (151.4 L)
Fuel tank (incomplete vehicle, aft axle
location).
426
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201804, Fourth-Printing Capacities and Specifications
Page 434 of 666

CAPACITIES AND SPECIFICATIONS - 6.7L DIESEL
Capacities
WARNING: The air conditioning refrigerant system contains refrigerant under
high pressure. Only qualified personnel should service the air conditioning refrigerant
system. Opening the air conditioning refrigerant system can cause personal injury. Capacity
Item
13.0 qt (12.3 L)
Engine oil (includes filter change)
35.1 qt (33.2 L)1
Engine coolant (primary high-temperature
cooling system loop)
15.1 qt (14.3 L)1
Engine coolant (secondary cooling system)
Between MIN and MAX on brake fluidreservoir
Brake fluid
2.7 qt (2.6 L)
Front axle
3.3–3.5 qt (3.1– 3.3 L)
Rear axle-10.5 inch (E-Locker)
3.5–3.6 qt (3.3– 3.4 L)
Rear axle-10.5 inch (non E-Locker)
3.61 qt (3.42 L)
Rear axle- Dana M275
3.78 qt (3.58 L)2
Rear axle- Dana M300
17.4 qt (16.5 L)4
Automatic transmission fluid 3
1.9 qt (1.8 L)
Transfer case fluid
Fill as required
Windshield washer fluid
29.0 gal (109.8 L)
Fuel Tank (142 inch and 148 inch wheel-
base, middle location)
34.0 gal (128.7 L)
Fuel Tank (160 inch and 164 inch wheel-
base, middle location)
48 gal (181.7 L)
Fuel Tank (176 inch wheelbase, middle
location)
26.5 gal (100.3 L)
Fuel tank (incomplete vehicle, middle
location)
431
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201804, Fourth-Printing Capacities and Specifications
Page 435 of 666

Capacity
Item
40.0 gal (151.4 L)
Fuel tank (incomplete vehicle, Aft- axle -
location)
66.5 gal (251.7 L)
Fuel tank (incomplete vehicle, Middle and
Aft- axle -locations)
7.4 gal (28 L)
Diesel Exhaust Fluid (DEF) (complete
vehicle)
7.2 gal (27.3 L)
Diesel Exhaust Fluid (DEF) (incomplete
vehicle)
27 oz (0.77 kg)
A/C refrigerant
3.4 fl oz (100 ml)
A/C refrigerant compressor oil
1 Use the coolant type originally equipped in your vehicle. Using any other coolant may
result in vehicle damage.
2 For complete refill of limited slip axles add 7.1 fl oz. (210 ml) of Additive Friction Modifier
XL-3 or equivalent meeting Specification EST-M2C118-A. The total lube volume of 3.78
qt (3.58 L) includes the added friction modifier.
3 Approximate dry fill capacity. Actual amount may vary during fluid changes.
4 Capacities may be higher if the vehicle is equipped with a cooler. Always check to make
sure the fluid level is in the acceptable range.
Specifications
Materials Specification
Name
WSS-M2C171-F1
Motor oil (U.S.): 1
Motorcraft® SAE 10W-30 Super Duty Diesel Motor Oil
XO-10W30-QSD
WSS-M2C171-F1
Motor oil (Canada): 1
Motorcraft® SAE 10W-30 Super Duty Diesel Motor Oil
CXO-10W30-LSD12
WSS-M97B57-A2
Engine and secondary cooling system coolant (U.S.):
Motorcraft® Yellow Prediluted Antifreeze/Coolant
VC-13DL-G
WSS-M97B57-A2
Engine and secondary cooling system coolant (Canada):
Motorcraft® Yellow Prediluted Antifreeze/Coolant
CVC-13DL-G
432
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201804, Fourth-Printing Capacities and Specifications
Page 440 of 666

CAPACITIES AND SPECIFICATIONS - 6.8L
Capacities
WARNING: The air conditioning refrigerant system contains refrigerant under
high pressure. Only qualified personnel should service the air conditioning refrigerant
system. Opening the air conditioning refrigerant system can cause personal injury. Capacity
Item
7.0 qt (6.6 L)
Engine oil (with oil filter)
26.7 qt (25.3 L)
Engine coolant
Between MIN and MAX on brake fluidreservoir
Brake fluid
2.7 qt (2.6 L)
Front axle
3.3–3.5 qt (3.1– 3.3 L)
Rear axle-10.5 inch (E-Locker)
3.5–3.6 qt (3.3– 3.4 L)
Rear axle-10.5 inch (non E-Locker)
3.78 qt (3.58 L)1
Rear axle-Dana M300
17.4 qt (16.5 L)2
Automatic transmission fluid
1.9 qt (1.8 L)
Transfer case fluid
Fill as required
Windshield washer fluid
26.5 gal (100.3 L)
Fuel tank (incomplete vehicle, middle
location)
40 gal (151.4 L)
Fuel tank (incomplete vehicle, Aft- axle -
location)
27 oz (0.77 kg)
A/C refrigerant
4.1 fl oz (120 ml)
A/C refrigerant compressor oil
1 For complete refill of limited slip axles, add 7.1 fl oz. (210 ml) of Additive Friction Modifier
XL-3 or equivalent, meeting Specification EST-M2C118-A. The total lube volume of 3.78
qt (3.58 L) includes the added friction modifier.
2 Approximate dry fill capacity. Actual amount may vary during fluid changes.
437
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201804, Fourth-Printing Capacities and Specifications