2012 FORD SUPER DUTY octane

Pure ethanol is the alcohol which is the intoxicating agent in liquor, beer
and wine. It is distilled from the fermentation of plants such as field corn
and sugar cane. When ethanol is produced for use in motor fuels, a small
amount of gasoline is added to make it unfit for beverage use. The
resulting ethanol blend is called denatured fuel ethanol meaning that it is
denatured with 2% to 5% gasoline and is suitable for automotive use.
During the summer season, fuel ethanol may contain a maximum of 85%
denatured ethanol (Ed85) and 15% unleaded gasoline. The fuel ethanol
has a higher octane rating than unleaded regular or premium gasoline
and this allows the design of engines with greater efficiency and power.
Winter blends may contain up to 75% denatured ethanol (Ed75) and up
to 25% unleaded gasoline to enhance cold engine starts. Severely cold
weather may require additional measures for reliable starting. Refer to
Startingin theDrivingchapter.
Ethanol is more chemically active than gasoline. It corrodes some metals
and causes some plastic and rubber components to swell, break down or
become brittle and crack, especially when mixed with gasoline. Special
materials and procedures have been developed for flexible fuel vehicles
and the dispensers used by ethanol fuel providers.
WARNING:Flexible fuel components and standard unleaded
gasoline fuel components are not interchangeable. If your vehicle
is not serviced in accordance with flexible fuel vehicles procedures,
damage may occur and your warranty may be invalidated.
WARNING:When refueling always shut the engine off and
never allow sparks or open flames near the filler neck. Never
smoke while refueling. Fuel vapor is extremely hazardous under certain
conditions. Care should be taken to avoid inhaling excess fumes.
WARNING:The flow of fuel through a fuel pump nozzle can
produce static electricity, which can cause a fire if fuel is
pumped into an ungrounded fuel container.
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WARNING:The fuel system may be under pressure. If the fuel
filler cap is venting vapor or if you hear a hissing sound, wait
until it stops before completely removing the fuel filler cap. Otherwise,
fuel may spray out and injure you or others.
WARNING:If you do not use the proper fuel filler cap,
excessive pressure or vacuum in the fuel tank may damage the
fuel system or cause the fuel cap to disengage in a collision, which may
result in possible personal injury.
FFV (Flex Fuel Vehicle) fuel cap
If your vehicle is FFV capable, it will have a yellow colored fuel cap.
Choosing the right fuel
If your vehicle is a flexible fuel vehicle (FFV), use only UNLEADED
FUEL and FUEL ETHANOL (Ed75–Ed85).
If your vehicle is not a flexible fuel vehicle (FFV), then only use
UNLEADED fuel or UNLEADED fuel blended with a maximum of 10%
ethanol. Do not use fuel ethanol (E85), diesel, methanol, leaded fuel or
any other fuel.
The use of leaded fuel is prohibited by law and could damage your
vehicle.
Your vehicle was not designed to use fuel or fuel additives with metallic
compounds, including manganese-based additives.
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.
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.
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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.
FFV engine (if equipped)
If your vehicle is flex fuel capable, it is designed to use Fuel Ethanol
(Ed75–Ed85), “Regular” unleaded gasoline or any mixture of the two
fuels.
Use of other fuels such as Fuel Methanol may cause powertrain
damage, a loss of vehicle performance, and your warranty may be
invalidated.
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 (18.9L)
when refueling. You should drive the vehicle immediately after refueling
for at least 5 miles (8 km) 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.
Fuel quality
Unleaded gasoline engines
If you experience starting, rough idle or hesitation driveability problems
during a cold start, try a different brand of “Regular” unleaded gasoline.
FFV engines
If you experience starting, rough idle or hesitation driveability problems
during a cold start, try a different brand of E85 fuel. If the driveability
problems continue, fill the vehicle with regular unleaded gasoline and
drive vehicle normally until gasoline is used. See your authorized dealer
if the problem persists.
Do not add aftermarket fuel additive products to your fuel tank. It
should not be necessary to add any aftermarket products to your fuel
tank if you continue to use high quality fuel of the recommended octane
rating. These products have not been approved for your engine and
could cause damage to the fuel system. Repairs to correct the effects of
using an aftermarket product in your fuel may not be covered by your
warranty.
87(R+M)/2 METHOD
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Filling the tank
The advertised fuel capacity of the fuel tank on your vehicle is equal to
the rated refill capacity of the fuel tank as listed in theMaintenance
product specifications and capacitiessection of this chapter.
The advertised capacity is the amount of the indicated capacity and the
empty reserve combined. Indicated capacity is the difference in the
amount of fuel in a full tank and a tank when the fuel gauge indicates
empty. Empty reserve is the small amount of fuel remaining in the fuel
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. When refueling your
vehicle after the fuel gauge indicates empty, you might not be
able to refuel the full amount of the advertised capacity of the
fuel tank due to the empty reserve still present in the tank.
For consistent results when filling the fuel tank:
•Turn the engine/ignition switch to the off position prior to refueling,
an error in the reading will result if the engine is left running.
•Use the same filling rate setting (low — medium — high) each time
the tank is filled.
•Allow no more than two automatic click-offs when filling.
•Always use fuel with the recommended octane rating.
•Use a known quality gasoline, preferably a national brand.
•Have the vehicle loading and distribution the same every time.
Your results will be most accurate if your filling method is consistent.
Calculating fuel economy
1. Fill the fuel tank completely and record the initial odometer reading
(in miles or kilometers).
2. Each time you fill the tank, record the amount of fuel added (in
gallons or liters).
3. After at least three to five tank fill-ups, fill the fuel tank and record
the current odometer reading.
4. Subtract your initial odometer reading from the current odometer
reading.
5. Follow one of the simple calculations in order to determine fuel
economy:
Calculation 1:Divide total miles traveled by total gallons used.
Maintenance and Specifications
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USA(fus)

ENGINE DATA
Engine 6.2L V8 engine 6.8L V10 engine
Cubic inches 378 413
Required fuel Minimum 87 octane Minimum 87 octane
Firing order 1-3-7-2-6-5-4-8 1-6-5-10-2-7-3-8-4-9
Spark plug gap0.041–0.047 inch
(1.04–1.20 mm)0.039–0.043 inch
(1.0–1.1 mm)
Ignition system Coil on plug Coil on plug
Compression ratio 9.8:1 9.2:1
Engine drivebelt routing
6.2L V8 engine
6.8L V10 engine with A/C
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checking and adding ..............379
dipstick ....................................379
filter, specifications ........380, 413
recommendations ...................380
refill capacities ........................414
Event data recording ....................8
Exhaust fumes ..........................273
F
Fail safe cooling ........................387
Fleet MyKey programming ......133
Flexible Fuel Vehicle (FFV) ....390
Floor mats .........................126–127
Fluid capacities .........................414
Fog lamps ....................................90
Four-Wheel Drive vehicles .......304
driving off road .......................311
electronic shift ................305, 309
indicator light .........................306
lever operated shift ................306
manual locking hubs ..............305
preparing to drive your
vehicle .....................................289
Fuel ............................................390
calculating fuel
economy ............................25, 396
cap ...........................................393
capacity ...................................414
choosing the right fuel ...........394
detergent in fuel .....................396
filling your vehicle with
fuel ...........................390, 393, 397
filter, specifications ........390, 413
fuel pump shut-off ..................324
improving fuel economy ........396
octane rating ...........394–395, 418
quality ......................................395
running out of fuel .................396safety information relating to
automotive fuels .....................390
Fuel - flex fuel vehicle
(FFV) .........................390, 394–395
Fuses ..................................324–325
G
Garage door opener ..................120
Gas cap (see Fuel cap) ............393
Gas mileage
(see Fuel economy) .................396
Gauges .........................................21
H
Hazard flashers .........................323
Headlamps ...................................89
aiming ..................................91–92
autolamp system .......................89
daytime running lights .............91
flash to pass ..............................90
high beam .................................90
replacing bulbs .........................95
turning on and off ....................89
Heating
heating and air conditioning
system .................................80, 83
Hill descent mode .....................285
Hill start assist ..........................299
Hood ..........................................375
I
Ignition ...............................269, 418
Illuminated visor mirror ...........101
Infant seats
(see Safety seats) .....................203
Index
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USA(fus)

Inspection/maintenance (I/M)
testing ........................................401
Instrument panel
cleaning ...........................369–370
cluster ........................................14
lighting up panel and
interior .......................................91
J
Jack ............................................334
positioning ...............................334
storage .....................................334
Jump-starting your vehicle ......351
K
Keyless entry system
autolock ...................................141
keypad .....................................152
locking and unlocking doors ..153
programming entry code .......152
Keys ...................................133, 154
positions of the ignition .........269
L
Lamps
autolamp system .......................89
daytime running light ...............91
fog lamps ...................................90
headlamps .................................89
headlamps, flash to pass ..........90
instrument panel, dimming .....91
interior lamps ...........................93
replacing bulbs .............95, 97–99
LATCH anchors .........................210
Lights, warning and indicator ....14
anti-lock brakes (ABS) ..........276
Loading instructions .................255Load limits .................................248
Locks
autolock ...................................141
childproof ................................145
doors ........................................141
Lug nuts ....................................350
Lumbar support, seats .............164
M
Manual transmission
fluid capacities ........................414
Message center ...............22–23, 40
english/metric button ...............28
system check button
................28
warning messages
...............29, 48
Mirrors
...............................108–109
automatic dimming rearview
mirror
......................................108
fold away
.................109, 111–112
heated
........................................83
programmable memory
..........147
side view mirrors (power)
.....109
signal
.......................................112
Moon roof
..................................118
Motorcraftparts
......................413
MyKey
........................................133
N
Navigation system
.......................79
O
Octane rating
....................394–395
Oil (see Engine oil)
..................379
Index
451
2012 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)