2017 FORD F450 SUPER DUTY octane

FUEL QUALITY - E85
Choosing the Right Fuel - Flex FuelVehicles
Flex fuel vehicles have one of the followingidentifiers:
•Yellow fuel filler cap.
•Yellow bezel around the fuel filler inlet.
•Yellow fuel filler housing.
•Yellow E85 label on the fuel tank fillerdoor.
Your vehicle is designed to operate onregular unleaded gasoline with a minimumpump (R+M)/2 octane rating of 87 orregular unleaded gasoline blended with amaximum of 85% ethanol (E85).
Some fuel stations, particularly those inhigh altitude areas, offer fuels posted asregular unleaded gasoline with an octanerating below 87. We do not recommendthese fuels.
For best overall vehicle and engineperformance, premium fuel with an octanerating of 91 or higher is recommended. Theperformance gained by using premium fuelis most noticeable in hot weather as wellas other conditions, for example whentowing a trailer. See Towing (page 268).
Do not use any fuel other than thoserecommended because they could lead toengine damage that will not be covered bythe vehicle Warranty.
Note:Use of any fuel other than thoserecommended can impair the emissioncontrol system and cause a loss of vehicleperformance.
Do not use:
•Diesel fuel.
•Fuels containing kerosene or paraffin.
•Fuels containing more than 85%ethanol or E100 fuel.
•Fuels containing methanol.
•Fuels containing metallic-basedadditives, including manganese-basedcompounds.
•Fuels containing the octane boosteradditive, methylcyclopentadienylmanganese tricarbonyl (MMT).
•Leaded fuel (using leaded fuel isprohibited by law).
The use of fuels with metallic compoundssuch as methylcyclopentadienylmanganese tricarbonyl (commonly knownas MMT), which is a manganese-basedfuel additive, will impair engineperformance and affect the emissioncontrol system.
Do not be concerned if the enginesometimes knocks lightly. However, if theengine knocks heavily while using fuel withthe recommended octane rating, contactan authorized dealer to prevent any enginedamage.
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Look for a label on the fuel pump toconfirm the amount of biodiesel containedin a diesel fuel. Biodiesel content is oftenindicated with the letter B followed by thepercent of biodiesel in the fuel. Forexample, B20 indicates a fuel containing20% biodiesel. Ask the service stationattendant to confirm the biodiesel contentof a diesel fuel if you do not see a label onthe fuel pump.
Biodiesel fuels degrade more easily thandiesel fuels not containing biodiesel andshould not be stored in the fuel tank formore than 1 month. If you plan to park orstore your vehicle for more than 1 month,then you should empty your vehicle fueltank of biodiesel fuel. You should fill thetank with a pure petroleum-based dieselfuel and run your vehicle for a minimum of30 minutes.
Note:Degraded or oxidized biodiesel candamage fuel system seals and plastics andcorrode steel parts.
During cold weather, if you have problemsoperating on biodiesel, you may need touse a diesel fuel with lower biodieselcontent, try another brand, or discontinuethe use of biodiesel.
Diesel Fuel Additives
It should not be necessary to add anyaftermarket additives to your fuel if youuse a high quality diesel fuel that conformsto ASTM industry specifications.Aftermarket additives can damage the fuelinjector system or engine.
Use Motorcraft® cetane booster or anequivalent cetane booster additive if yoususpect fuel has low cetane. UseMotorcraft® anti-gel & performanceimprover or an equivalent additive if thereis fuel gelling.
Do not use alcohol-based additives toimprove cetane quality, to prevent fuelgelling or any other use. The use of alcoholadditives may result in damage to the fuelinjectors and system. See Capacities andSpecifications (page 427).
The Vehicle Warranty may not coverrepairs needed to correct the effects ofusing an aftermarket product that doesnot meet Ford specifications in your fuel.
FUEL QUALITY - GASOLINE
Choosing the Right Fuel
We recommend regular unleaded gasolinewith a minimum pump (R+M)/2 octanerating of 87. Some fuel stations offer fuelsposted as regular unleaded gasoline withan octane rating below 87, particularly inhigh altitude areas. We do not recommendfuels with an octane rating below 87.
Do not use any fuel other than thoserecommended because they could lead toengine damage that may not be coveredby the vehicle Warranty.
Note:Use of any fuel other than thoserecommended can impair the emissioncontrol system and cause a loss of vehicleperformance.
Do not use:
•Diesel fuel.
•Fuels containing kerosene or paraffin.
•Fuel containing more than 15% ethanolor E85 fuel.
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•Fuels containing methanol.
•Fuels containing metallic-basedadditives, including manganese-basedcompounds.
•Fuels containing the octane boosteradditive, methylcyclopentadienylmanganese tricarbonyl (MMT).
•Leaded fuel (using leaded fuel isprohibited by law).
The use of fuels with metallic compoundssuch as methylcyclopentadienylmanganese tricarbonyl (commonly knownas MMT), which is a manganese-basedfuel additive, will impair engineperformance and affect the emissioncontrol system.
Do not be concerned if the enginesometimes knocks lightly. However, if theengine knocks heavily while using fuel withthe recommended octane rating, contactan authorized dealer to prevent any enginedamage.
RUNNING OUT OF FUEL
Avoid running out of fuel because thissituation may have an adverse effect onengine components.
If you have run out of fuel:
•You may need to cycle the ignition fromoff to on several times after refuelingto allow the fuel system to pump thefuel from the tank to the engine. Onrestarting, cranking time will take a fewseconds longer than normal. Withkeyless ignition, just start the engine.Crank time will be longer than usual.
•Normally, adding 1.06 gal (4 L) of fuelis enough to restart the engine. If thevehicle is out of fuel and on a steepgrade, more than 1.06 gal (4 L) may berequired.
SELECTIVE CATALYTIC
REDUCTION SYSTEM - DIESEL
Your vehicle may have a selective catalyticreduction system. The system helps reduceemission levels of oxides of nitrogen fromthe exhaust system. The systemautomatically injects diesel exhaust fluidinto the exhaust system to enable correctselective catalytic reduction systemfunction.
Note:Selective catalytic reduction systemsare not fitted to vehicles in markets whereonly high-sulfur diesel fuel is available.
Diesel Exhaust Fluid Level
In order for the system to operate correctlyyou must maintain the diesel exhaust fluidlevel.
A warning message appears in theinformation display when the dieselexhaust fluid level is low. If a warningmessage appears, refill the diesel exhaustfluid tank as soon as possible. SeeInformation Messages (page 128).
Filling the Diesel Exhaust FluidTank
WARNINGS
Keep diesel exhaust fluid out ofreach of children. Avoid contact withskin, eyes or clothing. In case ofcontact with your eyes, flush immediatelywith water and get prompt medicalattention. In case of contact with your skin,clean immediately with soap and water. Ifyou swallow any diesel exhaust fluid, drinkplenty of water, call a physicianimmediately.
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Fuel and Refueling

ENGINE SPECIFICATIONS - 6.2L
6.2L V8 EngineEngine
378Cubic inches
Minimum 87 octaneRequired fuel
1-5-4-8-6-3-7-2Firing order
Coil on plugIgnition system
0.041-0.047 in (1.04-1.20 mm)Spark plug gap
9.8:1Compression ratio
Drivebelt Routing
ENGINE SPECIFICATIONS - 6.7L DIESEL
Drivebelt Routing
6.7L DieselEngine
406Cubic inches
Low Sulfur Diesel up to B20Required fuel
1-3-7-2-6-5-4-8Firing order
16.2:1Compression ratio
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Capacities and SpecificationsE163761

Single AlternatorDual Alternator
ENGINE SPECIFICATIONS - 6.8L
6.8L V10 EngineEngine
413Cubic inches
Minimum 87 octaneRequired fuel
1-6-5-10-2-7-3-8-4-9Firing order
Coil on plugIgnition system
0.039 - 0.043 in (1.00 - 1.10 mm)Spark plug gap
9.2:1Compression ratio
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Capacities and SpecificationsE224819 E224820