
FUEL QUALITY
Note:
We recommend that you use only
high quality fuel without additives or other
engine treatments.
Note: Use of any fuel other than those
recommended may cause powertrain
damage, a loss of vehicle performance, and
repairs may not be covered under warranty.
Choosing the Right Fuel
Use only UNLEADED fuel or UNLEADED
fuel blended with a maximum of 15%
ethanol. Do not use fuel ethanol (E85),
diesel fuel, fuel-methanol, leaded fuel or
any other fuel because it could damage or
impair the emission control system. The
use of leaded fuel is prohibited by law.
Your vehicle was not designed to use fuel
or fuel additives with metallic compounds,
including manganese-based additives.
Diesel Engine
Refer to the diesel supplement for
information regarding diesel fuel
recommendations and requirements of
your diesel-powered truck.
Choosing the Right Fuel With a
Flex Fuel Vehicle (If Equipped)
Note: If your vehicle is flex fuel capable, it
will have a yellow bezel placed over the fuel
fill inlet.
Flex fuel vehicles are designed to use
unleaded gasoline or an ethanol fuel blend
that contain up to 85% ethanol. It is also
acceptable to use any mixture of unleaded
gasoline and ethanol fuel that contains up
to 85% ethanol. An ethanol fuel blend that
contains 85% ethanol is labeled as E85 at
the service station. It is best not to alternate repeatedly
between gasoline and E85. If you do switch
fuels, it is recommended that you add as
much fuel as possible—at least half a tank.
Do not add less than five gallons (18.9
liters) when refueling. You should drive the
vehicle immediately after refueling for at
least 5 miles (8 kilometers) to allow the
vehicle to adapt to the change in ethanol
concentration. If you exclusively use E85
fuel, it is recommended to fill the fuel tank
with regular unleaded gasoline at each
scheduled oil change.
Octane Recommendations
Regular unleaded gasoline with a pump
(R+M)/2 octane rating of 87 is
recommended. Some stations offer fuels
posted as Regular with an octane rating
below 87, particularly in high altitude areas.
Fuels with octane levels below 87 are not
recommended.
Do not be concerned if your engine
sometimes knocks lightly. However, if it
knocks heavily under most driving
conditions while you are using fuel with the
recommended octane rating, see your
authorized dealer to prevent any engine
damage.
RUNNING OUT OF FUEL
Avoid running out of fuel because this
situation may have an adverse effect on
powertrain components.
If you have run out of fuel:
134
Super Duty (TFA) Fuel and RefuelingE161513

Ford part number /
Ford specification
Ford part name or
equivalent
Capacity
Item
WSH-M1C231-B
3.53 fl oz (104.39
ml)
A/C Refrigerant
Compressor Oil 9
(Diesel engines)
1 Add 8 oz. (236 ml) of Additive Friction Modifier XL-3 or equivalent meeting Ford
Specification EST-M2C118– A for complete refill of limited slip Ford axles. Ford design
rear axles contain a synthetic lubricant that does not require changing unless the axle
has been submerged in water.
2 Add the coolant type originally equipped in your vehicle.
3 Your engine has been designed to use Motorcraft engine oils or equivalent oils that meet
Ford specifications. It is also acceptable to use an engine oil of recommended viscosity
grade that meets API SN requirements and displays the API Certification Mark for gasoline
engines
Note: Do not use API category oils labeled as SN, SM, SL or lower category unless the label
also displays the API certification mark. These oils do not meet the requirements for your
engine and emission system.
4 Do not use supplemental engine oil additives in your engine. They are unnecessary and
could lead to engine damage that is not covered by your Ford warranty.
5 Make sure the correct automatic transmission fluid is used. Transmission fluid
requirements are indicated on the dipstick blade or the dipstick handle. Check the container
to verify the fluid you are adding is of the correct type. Refer to your scheduled maintenance
information to determine the correct service interval.
Note: Automatic transmissions that require MERCON LV should only use MERCON LV fluid.
Use of any fluid other than the recommended fluid may cause transmission damage.
6 Indicates only approximate dry-fill capacity. Some applications may vary based on cooler
size and if equipped with an in-tank cooler. The amount of transmission fluid and fluid
level should be set by the indication on the dipstick’ s normal operating range.
7 See Transmission (page 140). See Checking automatic transmission fluid in this chapter
for the correct dipstick type. Fill to the proper capacity according to dipstick Type A.
8 See Transmission (page 140). See Checking automatic transmission fluid in this chapter
for the correct dipstick type. Fill to the proper capacity according to dipstick Type B.
9 WARNING
The A/C refrigerant system contains refrigerant R-134a under high pressure. Opening
the A/C refrigerant system can cause personal injury. A/C refrigerant system is to
be serviced only by qualified personnel.
299
Super Duty (TFA) Capacities and Specifications

Ford Motor Company has recommended
maintenance intervals for various parts
and component systems based upon
engineering testing. Ford Motor Company
relies upon this testing to determine the
most appropriate mileage for replacement
of oils and fluids to protect your vehicle at
the lowest overall cost to you and
recommends against maintenance
schedules that deviate from the scheduled
maintenance information.
We strongly recommend the use of only
genuine Ford, Motorcraft or
Ford-authorized re-manufactured
replacement parts engineered for your
vehicle.
Additives and Chemicals
This owner's manual and the Ford
Workshop Manual list the recommended
additives and chemicals for your vehicle.
We do not recommend using chemicals or
additives not approved by us as part of
your vehicle
’s normal maintenance. Please
consult your warranty information. Oils, Fluids and Flushing
In many cases, fluid discoloration is a
normal operating characteristic and, by
itself, does not necessarily indicate a
concern or that the fluid needs to be
changed. However, a qualified expert, such
as the factory-trained technicians at your
dealership, should inspect discolored fluids
that also show signs of overheating or
foreign material contamination
immediately.
Make sure to change your vehicle
’s oils and
fluids at the specified intervals or in
conjunction with a repair. Flushing is a
viable way to change fluid for many vehicle
sub-systems during scheduled
maintenance. It is critical that systems are
flushed only with new fluid that is the same
as that required to fill and operate the
system or using a Ford-approved flushing
chemical.
Owner Checks and Services
Make sure you perform the following basic
maintenance checks and inspections every
month or at six-month intervals. Check every month
Engine oil level.
Function of all interior and exterior lights.
Tires (including spare) for wear and proper pressure. Windshield washer fluid level. Check every six months
Battery connections. Clean if necessary.
Body and door drain holes for obstructions. Clean if necessary. Cooling system fluid level and coolant strength.
Door weatherstrips for wear. Lubricate if necessary.
429
Super Duty (TFA) Scheduled Maintenance