If the fuel cap warning lamp remains on,
at the next opportunity, safely pull off of
the road, remove the fuel filler cap, align
the cap properly and reinstall it. The check
fuel cap warning lamp or warning message
may not reset immediately. It may take
several driving cycles for the indicators to
turn off. A driving cycle consists of an
engine start-up (after four or more hours
with the engine off) followed by normal
city and highway driving.
Fuel Fill Rate
Your vehicle has a fuel fill pipe that is able
to accept fuel up to 20 gal (75 L) per
minute from a fuel-dispensing nozzle.
Pumping fuel at greater flow rates may
result in premature nozzle shut-off or spit
back.
Truck stops have fuel pumps and nozzles
designed for larger, heavy-duty trucks. If
you are refueling your vehicle at a truck
stop and the nozzle shuts off repeatedly,
wait 5-10 seconds, then use a slower fill
rate.
FUEL CONSUMPTION
Real world fuel consumption is governed
by many factors, for example driving style,
high speed driving, stop-start driving, air
conditioning usage, the accessories fitted,
payload and towing. •
The usable capacity of the fuel tank is
the amount of fuel that can be added
into the tank after the gauge indicates
empty.
• The advertised capacity is the total fuel
tank size. See
Capacities and
Specifications (page 252). It is the
combined usable capacity plus the
empty reserve.
• Due to the empty reserve, you may not
be able to refuel the full amount of the
advertised capacity of the fuel tank
even when the fuel gauge reads empty.
Empty reserve is the amount of fuel
remaining in the 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.
Filling the Tank
For consistent results when filling the fuel
tank:
• Turn the ignition off before refueling
your vehicle; a temporary inaccurate
reading may result if the engine is left
on when refueling your vehicle.
• Use the same fill rate
(low-medium-high) each time the tank
is refueled.
• Allow no more than two automatic
click-offs when refueling your vehicle.
Results are most accurate when the filling
method is consistent.
Calculating Fuel Economy
Do not measure fuel economy during the
first
900 mi (1,500 km) of driving (this is
your engine ’s break-in period); a more
accurate measurement is obtained after
1,900 mi (3,000 km)
.
Fuel expense, frequency of fill ups or fuel
gauge readings are not accurate ways to
measure fuel economy.
102
F-650/750 (TBC) , enUSA, First Printing Fuel and Refueling
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)
28.8 qt (27.3 L)1
Engine coolant
58 gal (219.5 L)
Fuel tank (Limited Series)
(Usable capacity)2
62 gal (234.6 L)
(Liquid capacity)
47 gal (177.9 L)
Fuel tank (Small)
(Usable capacity)2
50 gal (189.2 L)
(Liquid capacity)
59 gal (223.3 L)
Fuel tank (Large)
(Usable capacity)2
63 gal (238.4 L)
(Liquid capacity)
Between MIN and MAX on brake fluid reservoir
Brake fluid
17.4 qt (16.5 L)3
Automatic transmission fluid
6–7 fl oz (177 –207 ml)
Front axle wheel bearing oil (8500 lb axle)
12–13 fl oz (355– 385 ml)
Front axle wheel bearing oil (all except
8500 lb axle)
19 pt (9.0 L)4
Rear axle (S-140)(13.5k, 17.5k, 19k single
speed)
37 pt (17.5 L)4
Rear axle (S-170)(23k single speed)
258
F-650/750 (TBC) , enUSA, First Printing Capacities and Specifications
Capacity
Item
15.1 qt (14.3 L)1
Engine coolant (secondary cooling system)
16.0 fl oz (473 ml)2
Engine coolant additive (secondary cooling
system)
8 gal (30.2 L)
Diesel Exhaust Fluid (DEF)
61 gal (230.9 L)
Fuel tank (Dual)(Left side)
(Usable capacity)3
65 gal (246 L)
(Liquid capacity)
47 gal (177.9 L)
Fuel tank (Dual)(Right side)
(Usable capacity)3
50 gal (189.2 L)
(Liquid capacity)
47 gal (177.9 L)
Fuel tank (Small)
(Usable capacity)3
50 gal (189.2 L)
(Liquid capacity)
53 gal (200.6 L)
Fuel tank (Medium)
(Usable capacity)3
56 gal (211.9 L)
(Liquid capacity)
61 gal (230.9 L)
Fuel tank (Large)
(Usable capacity)3
65 gal (246 L)
(Liquid capacity)
Between MIN and MAX on brake fluid reservoir
Brake Fluid
16.3 qt (15.4 L)4
Automatic Transmission Fluid
6–7 fl oz (177 –207 ml)
Front axle wheel bearing oil (8500 lb axle)
12–13 fl oz (355– 385 ml)
Front axle wheel bearing oil (all except
8500 lb axle)
264
F-650/750 (TBC) , enUSA, First Printing Capacities and Specifications
