2021 FORD F-150 adding oil

Use Motorcraft® cetane booster or an
equivalent cetane booster additive if you
suspect fuel has low cetane. Use
Motorcraft® anti-gel and 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 could result in damage to the fuel
injectors and system.
Your Warranty may not cover repairs
needed to correct the effects of using an
aftermarket product that does not meet
our specifications in your fuel.
SWITCHING BETWEEN E85 AND
GASOLINE
We do not recommend repeatedly
alternating between E85 and gasoline. If
you switch from using E85 to gasoline, or
from gasoline to E85, add as much fuel as
possible, at least half a tank. Drive your
vehicle immediately for a minimum of 5 mi
(8 km) to allow it to adapt to the change
in ethanol concentration. If you use E85
exclusively, we recommend that you fill
the fuel tank with regular unleaded
gasoline at each scheduled oil change.
LOCATING THE FUEL FILLER
FUNNEL
Regular Cab
The fuel filler funnel is behind the
right-hand front seat.
Super Cab/Crew Cab
The fuel filler funnel is under the second
row right-hand rear seat. RUNNING OUT OF FUEL
FILLING A PORTABLE FUEL
CONTAINER WARNING:
Flow of fuel through a
fuel pump nozzle can produce static
electricity. This can cause a fire if you are
filling an ungrounded fuel container.
Use the following guidelines to avoid
electrostatic charge build-up, which can
produce a spark, when filling an
ungrounded fuel container:
• Only use an approved fuel container to
transfer fuel to your vehicle. Place the
container on the ground when filling it.
• Do not fill a fuel container when it is
inside your vehicle (including the cargo
area).
• Keep the fuel pump nozzle in contact
with the fuel container when filling it.
• Do not use a device that holds the fuel
pump nozzle lever in the fill position.
ADDING FUEL FROM A PORTABLE
FUEL CONTAINER WARNING: Do not insert the nozzle
of a fuel container or an aftermarket
funnel into the fuel filler neck. This may
damage the fuel system filler neck or its
seal and cause fuel to run onto the
ground. WARNING:
Do not pry open the
fuel tank filler valve. This could damage
the fuel system. Failure to follow this
instruction could result in fire, personal
injury or death.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Fuel and Refueling

•
Moderate braking is particularly
important since it allows you to
maximize the energy captured by the
regenerative braking system.
• Drive at steady speeds without
stopping.
• Anticipate stops; slowing down may
eliminate the need to stop.
• Driving on flat terrain.
• Drive at reasonable speeds and
observe posted speed limits.
• Shut all windows when driving at high
speeds.
• Combine errands and minimize
stop-and-go driving.
• Drive with the tonneau cover installed
if your vehicle comes with one.
• Keep the tires properly inflated and use
only the recommended size.
• Use the recommended engine oil.
• Follow the recommended maintenance
schedule and carry out the
recommended checks.
• Perform all scheduled maintenance.
Note: Having your engine running is not
always an indication of inefficiency. In some
cases, it is actually more efficient than
driving in electric mode.
Avoid these actions; they reduce your fuel
consumption:
• Revving the engine.
• Aggressive driving increases the
amount of energy required to move
your vehicle.
• Driving in lower temperatures during
the first 5–10 mi (12 –16 km) of driving.
• Idle for periods longer than one minute.
• Use the air conditioner or front
defroster. •
Adding certain accessories to your
vehicle like bug deflectors, rollbars,
light bars, running boards, ski racks or
luggage racks.
• Use the speed control in hilly terrain.
• Using fuel blended with alcohol.
• Drive a heavily loaded vehicle or tow a
trailer.
• Driving with the wheels out of
alignment.
DRIVING IN SPECIAL
CONDITIONS
EMERGENCY MANEUVERS
In an unavoidable emergency where you
must make a sudden sharp maneuver, turn
the steering wheel only as rapidly and as
far as required to avoid the emergency.
Apply smooth pressure to the accelerator
pedal or brake pedal as needed. Avoid
abrupt steering, acceleration and braking
changes. Abrupt changes could increase
the risk of vehicle roll over, loss of vehicle
control and personal injury. If possible, use
any available road surfaces to bring your
vehicle under control.
FLOOR MATS WARNING:
Use a floor mat
designed to fit the footwell of your
vehicle that does not obstruct the pedal
area. Failure to follow this instruction
could result in the loss of control of your
vehicle, personal injury or death. WARNING:
Pedals that cannot
move freely can cause loss of vehicle
control and increase the risk of serious
personal injury.
477
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Driving Hints

UNDER HOOD OVERVIEW - 3.5L, HYBRID ELECTRIC VEHICLE
(HEV)
Engine compartment fuse box. See Fuses (page 493).
A.
Battery.
See Changing the 12V Battery (page 519).
B.
Engine oil dipstick.
See Engine Oil Dipstick Overview (page 510).
C.
Engine oil filler cap.
See Adding Engine Oil (page 510).
D.
Brake fluid reservoir. See
Checking the Brake Fluid (page 309).
E.
Air filter.
See Changing the Engine Air Filter (page 517).
F.
Secondary coolant reservoir. See
Checking the Coolant (page 511).
G.
Engine coolant reservoir. See
Checking the Coolant (page 511).
H.
Windshield washer fluid reservoir.
I.
508
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing MaintenanceE333718

ENGINE OIL
ENGINE OIL DIPSTICK OVERVIEW
- DIESEL
Minimum.
A
Nominal.
B
Maximum.
C
ENGINE OIL DIPSTICK OVERVIEW
- GASOLINE, HYBRID ELECTRIC
VEHICLE (HEV) Minimum.
A
Nominal.
B
Maximum.
C CHECKING THE ENGINE OIL LEVEL
1. Make sure that your vehicle is on level
ground.
2. Check the oil level before starting the engine, or switch the engine off after
warming up and wait 10 minutes for
the oil to drain into the oil pan.
3. Remove the dipstick and wipe it with a clean, lint-free cloth.
4. Reinstall the dipstick and make sure it is fully seated.
5. Remove the dipstick again to check the
oil level.
Note: If the oil level is between the
maximum and minimum marks, the oil level
is acceptable. Do not add oil.
6. If the oil level is at the minimum mark, immediately add oil.
7. Reinstall the dipstick. Make sure it is fully seated.
Note: The oil consumption of new engines
reaches its normal level after approximately
3,000 mi (5,000 km).
ADDING ENGINE OIL WARNING: Do not remove the filler
cap when the engine is running. WARNING:
Do not add engine oil
when the engine is hot. Failure to follow
this instruction could result in personal
injury.
Do not use supplemental engine oil
additives because they are unnecessary
and could lead to engine damage that the
vehicle warranty may not cover.
1. Clean the area surrounding the engine oil filler cap before you remove it.
2. Remove the engine oil filler cap.
510
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing MaintenanceE249448 E270482

Eco Idle – Troubleshooting.......................251
Eco Idle – Frequently Asked
Questions.......................................................... 251
Electric Parking Brake Audible Warning.........................................................312
Electric Parking Brake..................................311
Electric Parking Brake –
Troubleshooting............................................. 312
Electric Parking Brake – Troubleshooting.........................................312
Electric Parking Brake – Information Messages.......................................................... 313
Electric Parking Brake – Warning Lamps................................................................. 312
Electric Power Steering.............................332 Electric Power Steering Adaptive
Steering............................................................. 332
Electric Power Steering Precautions..........332
Electromagnetic Compatibility
..............763
Electronic Locking Differential................301 Electronic Locking Differential –
Troubleshooting........................................... 306
Electronic Locking Differential Indicators....................................................306
Electronic Locking Differential Precautions..................................................301
Electronic Locking Differential – Troubleshooting.......................................306
Electronic Locking Differential – Information Messages................................ 306
Emergency Call Limitations.......................88
Emergency Call Requirements
..................87
Emergency Call System Data....................32
Emergency Towing
......................................492
Emission Law................................................760
Enabling Apps on an Android Device...........................................................649
Enabling Apps on an iOS Device...........649
Enabling or Disabling Personal Profiles...........................................................651
Enabling Remote Start...............................183
End User License Agreement..................735
Engine Air Filter..............................................515 Changing the Engine Air Filter....................... 516
Checking the Engine Air Filter Restriction Gauge................................................................. 515
Engine Air Filter - Information Messages.......................................................... 518Engine Block Heater...................................240
Engine Block Heater Precautions................240
How Does the Engine Block Heater
Work.................................................................... 241
Using the Engine Block Heater...................... 241
Engine Coolant Temperature Gauge..............................................................172
Engine Oil Capacity and Specification - 2.7L EcoBoost™
........................................587
Engine Oil Capacity and Specification - 3.0L Diesel
..................................................588
Engine Oil Capacity and Specification - 3.3L................................................................590
Engine Oil Capacity and Specification - 3.5L, Hybrid Electric Vehicle
(HEV)............................................................594
Engine Oil Capacity and Specification - 3.5L Ecoboost™........................................592
Engine Oil Capacity and Specification - 5.0L................................................................596
Engine Oil........................................................510 Adding Engine Oil............................................... 510
Checking the Engine Oil Level....................... 510
Engine Oil Capacity and Specification........511
Engine Oil Dipstick Overview......................... 510
Resetting the Engine Oil Change Reminder............................................................ 511
Engine Oil Pressure Gauge........................172
Engine Specifications - 2.7L EcoBoost™.................................................574
Engine Specifications - 3.0L Diesel.......575
Engine Specifications - 3.3L....................576
Engine Specifications - 3.5L, Hybrid Electric Vehicle (HEV)
.............................578
Engine Specifications - 3.5L Ecoboost™..................................................577
Engine Specifications - 5.0L....................579
Entering a Parallel Parking Space.........346
Entering a Perpendicular Parking Space.............................................................347
Evasive Steering Assist.............................402 Evasive Steering Assist Limitations............402
Switching Evasive Steering Assist On and
Off...................................................................... 402
What Is Evasive Steering Assist................... 402
Event Data
........................................................30
Exiting a Parking Space.............................347
Export Unique Options...............................761
774
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Index