Ford Super Duty (2017 year). Manual — part 46

WARNINGS

Do not add gasoline, gasohol or
alcohol to diesel fuel. This practice
creates a serious fire hazard resulting

in personal injury and engine performance
problems.

Do not use home heating oil or any
diesel fuel not intended for highway
use. Damage to the fuel injection

system, engine, exhaust catalyst and diesel
particulate filter can occur if an improper
fuel is used. Red dye is used to identify
fuels intended for agricultural and
non-highway use.

You may operate your vehicle on diesel
fuels containing up to 20% biodiesel, also
known as B20.

Biodiesel fuel is a chemically converted
product from renewable fuel sources, such
as vegetable oils, animal fats and waste
cooking greases.

To help achieve acceptable engine
performance and durability when using
biodiesel in your vehicle:
•

Confirm the biodiesel content of the
fuel to be B20 (20% biodiesel) or less

•

Only use biodiesel fuel of good quality
that complies with industry standards

•

Follow the recommended service
maintenance intervals. See
Scheduled Maintenance (page 567).

•

Do not store biodiesel fuel in the fuel
tank for more than 1 month

•

Consider changing brands or reducing
biodiesel content if you have cold
temperature fuel gelling issues or a
frequent LOW FUEL PRESSURE
message appearing

•

Do NOT use raw oils, fats or waste
cooking greases

Use of biodiesel in concentrations greater
than 20% may cause damage to your
vehicle, including engine and/or exhaust
after-treatment hardware (exhaust
catalyst and particulate filter) failures.
Concentrations greater than 20% can also
cause fuel filter restrictions that may result
in a lack of power or damage to fuel
system components, including fuel pump
and fuel injector failures.

SAE 5W-40 or SAE 15W-40 oil is
recommended for fuels with greater than
5% biodiesel (B5). Refer to the Special
operating conditions section under the
Schedule Maintenance chapter for more
information about oil change intervals and
other maintenance when operating on
biodiesel.

Look for a label on the fuel pump to
confirm the amount of biodiesel contained
in a diesel fuel. Biodiesel content is often
indicated with the letter B followed by the
percent of biodiesel in the fuel. For
example, B20 indicates a fuel containing
20% biodiesel. Ask the service station
attendant to confirm the biodiesel content
of a diesel fuel if you do not see a label on
the fuel pump.

Biodiesel fuels degrade more easily than
diesel fuels not containing biodiesel and
should not be stored in the fuel tank for
more than 1 month. If you plan to park or
store your vehicle for more than 1 month,
then you should empty your vehicle fuel
tank of biodiesel fuel. You should fill the
tank with a pure petroleum-based diesel
fuel and run your vehicle for a minimum of
30 minutes.

Note: Degraded or oxidized biodiesel can
damage fuel system seals and plastics and
corrode steel parts.

During cold weather, if you have problems
operating on biodiesel, you may need to
use a diesel fuel with lower biodiesel
content, try another brand, or discontinue
the use of biodiesel.

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Diesel Fuel Additives

It should not be necessary to add any
aftermarket additives to your fuel if you
use a high quality diesel fuel that conforms
to ASTM industry specifications.
Aftermarket additives can damage the fuel
injector system or engine.

Use Motorcraft® cetane booster or an
equivalent cetane booster additive if you
suspect fuel has low cetane. Use
Motorcraft® anti-gel & performance
improver or an equivalent additive if there
is fuel gelling.

Do not use alcohol-based additives to
improve cetane quality, to prevent fuel
gelling or any other use. The use of alcohol
additives may result in damage to the fuel
injectors and system. See Capacities and
Specifications (page 428).

The Vehicle Warranty may not cover
repairs needed to correct the effects of
using an aftermarket product that does
not meet Ford specifications in your fuel.

RUNNING OUT OF FUEL

Avoid running out of fuel because this
situation may have an adverse effect on
engine components.

If you have run out of fuel:

•

You may need to cycle the ignition from
off to on several times after refueling
to allow the fuel system to pump the
fuel from the tank to the engine. On
restarting, cranking time will take a few
seconds longer than normal. With
keyless ignition, just start the engine.
Crank time will be longer than usual.

•

Normally, adding 1.06 gal (4 L) of fuel
is enough to restart the engine. If the
vehicle is out of fuel and on a steep
grade, more than 1.06 gal (4 L) may be
required.

SELECTIVE CATALYTIC
REDUCTION SYSTEM - DIESEL

Your vehicle may have a selective catalytic
reduction system. The system helps reduce
emission levels of oxides of nitrogen from
the exhaust system. The system
automatically injects diesel exhaust fluid
into the exhaust system to enable correct
selective catalytic reduction system
function.

Note: Selective catalytic reduction systems
are not fitted to vehicles in markets where
only high-sulfur diesel fuel is available.

Diesel Exhaust Fluid Level

In order for the system to operate correctly
you must maintain the diesel exhaust fluid
level.

A warning message appears in the
information display when the diesel
exhaust fluid level is low. If a warning
message appears, refill the diesel exhaust
fluid tank as soon as possible. See
Information Messages (page 128).

Filling the Diesel Exhaust Fluid
Tank

WARNINGS

Keep diesel exhaust fluid out of
reach of children. Avoid contact with
skin, eyes or clothing. In case of

contact with your eyes, flush immediately
with water and get prompt medical
attention. In case of contact with your skin,
clean immediately with soap and water. If
you swallow any diesel exhaust fluid, drink
plenty of water, call a physician
immediately.

188

WARNINGS

Only refill the diesel exhaust fluid
tank in a well ventilated area. When
you remove the diesel exhaust fluid

tank filler cap or a diesel exhaust fluid
container cap, ammonia vapors may
escape. Ammonia vapors can be irritating
to skin, eyes and mucous membranes.
Inhaling ammonia vapors can cause
burning to the eyes, throat and nose and
cause coughing and watery eyes.

E226045

The diesel exhaust fluid tank has a blue
filler cap. The tank is behind the left-hand
front wheel. Fill the tank using a fluid pump
at a diesel exhaust fluid filling station or a
diesel exhaust fluid container. We
recommend Motorcraft® diesel exhaust
fluid. See Capacities and Specifications
(page 428).

E163354

)

E163354

Only use diesel exhaust fluid that is
certified by the American Petroleum
Institute (API). Non-certified diesel exhaust
fluid use can cause damage not covered
by the vehicle Warranty.

Note: Do not put diesel exhaust fluid in the
fuel tank. This can cause damage not
covered by the vehicle Warranty.

You can purchase diesel exhaust fluid at
an authorized dealer, most highway truck
stops or you can contact roadside
assistance for help in finding a retailer that
sells diesel exhaust fluid. In addition, there
is a government website to help you find
the nearest location to purchase diesel
exhaust fluid:
http://www.discoverdef.com.

Filling the Diesel Exhaust Fluid Tank
Using a Fuel Station Pump

Filling the diesel exhaust fluid tank using
a nozzle is similar to fuel fill. The nozzle
shuts off automatically when the tank is
full.

Filling the Diesel Exhaust Fluid Tank
Using a Container

The following procedure applies to
Motorcraft diesel exhaust fluid or similar
fluid containers. Always follow the
manufacturer's instructions.

1.

Remove the diesel exhaust fluid
container cap. Place the spout on to
the container and tighten it until you
feel a strong resistance.

189

2. Remove the diesel exhaust fluid tank

filler cap.

3. Insert the spout in to the filler neck until

the seal on the spout seats on to the
filler neck. Pour the fluid in to the tank.
When the tank is full the fluid will stop
flowing automatically.

4. Return the container to the vertical

position slightly below the diesel
exhaust fluid filler neck. Allow any fluid
remaining in the spout to drain back in
to the container.

5. Remove the spout from the diesel

exhaust fluid filler neck. Replace the
diesel exhaust fluid tank cap.

6. Remove the spout from the diesel

exhaust fluid container and replace the
cap.

Note: If there is diesel exhaust fluid left in
the container retain it for later use. The
spout is re-useable. Wash the spout with
clean water prior to storage. Do not use the
diesel exhaust fluid spout with any other
fluid.

Filling the Diesel Exhaust Fluid Tank in
Cold Climates

Diesel exhaust fluid may freeze if the
ambient temperature is below 12°F (-11°C).
Your vehicle has a preheating system
which allows diesel exhaust fluid to
operate below 12°F (-11°C). If you do not
use your vehicle for an extended period
when the ambient temperature is below
12°F (-11°C), the fluid in the tank may
freeze. If the tank is overfilled and the fluid
freezes it may damage the tank. This is not
covered by the vehicle warranty.

Diesel Exhaust Fluid Warning
Messages and Vehicle Operations

WARNINGS

Diesel exhaust fluid must be refilled
when low or replaced when
contaminated or your vehicle speed

becomes limited to 50 mph (80 km/h). In
these conditions, drive with caution and
refill diesel exhaust fluid immediately. If
the diesel exhaust fluid becomes empty
or contaminated and fluid is not replaced,
your vehicle becomes limited to engine idle
only once stopped. In these conditions, be
cautious where you stop your vehicle
because you may not be able to drive long
distances or maintain highway speeds until
you refill or replace the diesel exhaust fluid.

Tampering with or disabling selective
catalytic reduction system results in
severe vehicle performance

limitation including eventual speed limiting
to 5 mph (5 km/h).

The information display shows a series of
messages about the amount of diesel
exhaust fluid available. A systems check
displays messages indicating the amount
of diesel exhaust fluid available or displays
a warning message indicating the
approximate distance remaining as the
fluid in the diesel exhaust fluid tank nears
empty. See Information Messages
(page 128).

E163176

As the diesel exhaust fluid level
nears empty, the warning
symbol displays and a series of

tones and messages starting at 500 mi
(800 km) remaining before diesel exhaust
fluid is depleted. The warning symbol and
messages continue until you refill the
diesel exhaust fluid tank.

190