2017 FORD F250 SUPER DUTY fuel cap

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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WARNINGS
Only refill the diesel exhaust fluidtank in a well ventilated area. Whenyou remove the diesel exhaust fluidtank filler cap or a diesel exhaust fluidcontainer cap, ammonia vapors mayescape. Ammonia vapors can be irritatingto skin, eyes and mucous membranes.Inhaling ammonia vapors can causeburning to the eyes, throat and nose andcause coughing and watery eyes.
The diesel exhaust fluid tank has a bluefiller cap. The tank is behind the left-handfront wheel. Fill the tank using a fluid pumpat a diesel exhaust fluid filling station or adiesel exhaust fluid container. Werecommend Motorcraft® diesel exhaustfluid. See Capacities and Specifications(page 427).
Only use diesel exhaust fluid that iscertified by the American PetroleumInstitute (API). Non-certified diesel exhaustfluid use can cause damage not coveredby the vehicle Warranty.
Note: Do not put diesel exhaust fluid in thefuel tank. This can cause damage notcovered by the vehicle Warranty.
You can purchase diesel exhaust fluid atan authorized dealer, most highway truckstops or you can contact roadsideassistance for help in finding a retailer thatsells diesel exhaust fluid. In addition, thereis a government website to help you findthe nearest location to purchase dieselexhaust fluid:http://www.discoverdef.com.
Filling the Diesel Exhaust Fluid TankUsing a Fuel Station Pump
Filling the diesel exhaust fluid tank usinga nozzle is similar to fuel fill. The nozzleshuts off automatically when the tank isfull.
Filling the Diesel Exhaust Fluid TankUsing a Container
The following procedure applies toMotorcraft diesel exhaust fluid or similarfluid containers. Always follow themanufacturer's instructions.
1. Remove the diesel exhaust fluidcontainer cap. Place the spout on tothe container and tighten it until youfeel a strong resistance.
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2. Remove the diesel exhaust fluid tankfiller cap.
3.Insert the spout in to the filler neck untilthe seal on the spout seats on to thefiller neck. Pour the fluid in to the tank.When the tank is full the fluid will stopflowing automatically.
4. Return the container to the verticalposition slightly below the dieselexhaust fluid filler neck. Allow any fluidremaining in the spout to drain back into the container.
5. Remove the spout from the dieselexhaust fluid filler neck. Replace thediesel exhaust fluid tank cap.
6. Remove the spout from the dieselexhaust fluid container and replace thecap.
Note:If there is diesel exhaust fluid left inthe container retain it for later use. Thespout is re-useable. Wash the spout withclean water prior to storage. Do not use thediesel exhaust fluid spout with any otherfluid.
Filling the Diesel Exhaust Fluid Tank inCold Climates
Diesel exhaust fluid may freeze if theambient temperature is below 12°F (-11°C).Your vehicle has a preheating systemwhich allows diesel exhaust fluid tooperate below 12°F (-11°C). If you do notuse your vehicle for an extended periodwhen the ambient temperature is below12°F (-11°C), the fluid in the tank mayfreeze. If the tank is overfilled and the fluidfreezes it may damage the tank. This is notcovered by the vehicle warranty.
Diesel Exhaust Fluid WarningMessages and Vehicle Operations
WARNINGS
Diesel exhaust fluid must be refilledwhen low or replaced whencontaminated or your vehicle speedbecomes limited to 50 mph (80 km/h). Inthese conditions, drive with caution andrefill diesel exhaust fluid immediately. Ifthe diesel exhaust fluid becomes emptyor contaminated and fluid is not replaced,your vehicle becomes limited to engine idleonly once stopped. In these conditions, becautious where you stop your vehiclebecause you may not be able to drive longdistances or maintain highway speeds untilyou refill or replace the diesel exhaust fluid.
Tampering with or disabling selectivecatalytic reduction system results insevere vehicle performancelimitation including eventual speed limitingto 5 mph (5 km/h).
The information display shows a series ofmessages about the amount of dieselexhaust fluid available. A systems checkdisplays messages indicating the amountof diesel exhaust fluid available or displaysa warning message indicating theapproximate distance remaining as thefluid in the diesel exhaust fluid tank nearsempty. See Information Messages(page 128).
As the diesel exhaust fluid levelnears empty, the warningsymbol displays and a series oftones and messages starting at 500 mi(800 km) remaining before diesel exhaustfluid is depleted. The warning symbol andmessages continue until you refill thediesel exhaust fluid tank.
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Continued driving without refilling resultsin the following actions as required by theCalifornia Air Resources Board (CARB) andthe U.S. Environmental Protection Agency(EPA):
•Within a preset distance to empty,speed is limited upon vehicle restart.Prior to this occurring a messageappears in the information display.
•Further vehicle operation withoutrefilling the diesel exhaust fluid tankcauses the engine to enter an idle-onlycondition. This only occurs upon vehiclerefueling or at an extended idle. Amessage indicates the required actionsto resume normal operation. It isrequired to add a minimum of 1.0 gal(3.8 L) of diesel exhaust fluid to thetank to exit the idle-only condition, butyour vehicle is still in the speed-limitingmode until you refill the tankcompletely.
Note:For either vehicle speed limiting oridle-only condition, normal vehicle operationresumes when you refill the diesel exhaustfluid tank.
Note:When filling the diesel exhaust fluidtank from empty, there may be a short delaybefore detecting the increased level of fluid.The increased level detection must occurbefore your vehicle returns to full power.
Diesel Exhaust Fluid Guidelinesand Information
•Use only diesel exhaust fluid thatcarries the American PetroleumInstitute (API) certified diesel exhaustfluid trademark or ISO 22241.
•Do not put diesel exhaust fluid in thediesel fuel tank.
•Do not overfill the diesel exhaust fluidtank.
•Diesel exhaust fluid is corrosive.
•Do not re-use the diesel exhaust fluidcontainer once it is emptied.
•Avoid spilling diesel exhaust fluid onpainted surfaces, carpeting or plasticcomponents. Immediately wipe awayany diesel exhaust fluid that has spilledwith a damp cloth and water. If it hasalready crystallized, use warm waterand a sponge.
•Store diesel exhaust fluid out of directsunlight and in temperatures between23°F (-5°C) and 68°F (20°C).
•Diesel exhaust fluid freezes below 12°F(-11°C).
•Do not store the diesel exhaust fluidbottle in your vehicle. If it leaks it couldcause damage to interior componentsor release an ammonia odor inside yourvehicle.
•Diesel exhaust fluid is non-flammable,non-toxic, colorless and water-solubleliquid.
•The system has a diesel exhaust fluidquality sensor. Dilution of dieselexhaust fluid or use of any other liquidin the SCR system leads to a dieselexhaust fluid system fault, eventuallyleading to the vehicle only operating inidle-only mode.
•Do not dilute diesel exhaust fluid withwater or any other liquid.
•An ammonia odor may be smelledwhen the cap is removed or duringrefill. Refill diesel exhaust fluid in a wellventilated area.
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Fuel and Refueling

Use the following guidelines to avoidelectrostatic charge build-up when fillingan ungrounded fuel container:
•Place approved fuel container on theground.
•Do not fill a fuel container while it is inthe vehicle (including the cargo area).
•Keep the fuel pump nozzle in contactwith the fuel container while filling.
•Do not use a device that would holdthe fuel pump handle in the fill position.
Fuel Filler Cap
WARNINGS
The fuel system may be underpressure. If you hear a hissing soundnear the fuel filler door, do not refueluntil the sound stops. Otherwise, fuel mayspray out, which could cause seriouspersonal injury.
If you do not use the proper fuel fillercap, excessive pressure or vacuumin the fuel tank may damage the fuelsystem or cause the fuel cap to disengagein a collision, which may result in possiblepersonal injury.
Note:If you must replace the fuel filler cap,replace it with a fuel filler cap that isdesigned for your vehicle. The customerwarranty may be void for any damage to thefuel tank or fuel system if the correctgenuine Ford, Motorcraft or other certifiedfuel filler cap is not used.
Your fuel tank filler cap has an indexeddesign with a 1/4th turn on and off feature.When fueling your vehicle:
1. Put your vehicle in park (P).
2. Switch the engine off.
3. Carefully turn the filler capcounterclockwise until it spins off.
4. Pull to remove the cap from the fuelfiller pipe.
5.To install the cap, align the tabs on thecap with the notches on the filler pipe.
6. Turn the filler cap clockwise 1/4 of aturn clockwise until it clicks at leastonce.
If the Check Fuel Cap light or a Check FuelCap message appears in the instrumentcluster and stays on after you start theengine, you may not have installed the fuelfiller properly.
If the fuel cap light remains on, at the nextopportunity, safely pull off of the road,remove the fuel filler cap, align the capproperly and reinstall it. The check fuel caplight or Check fuel cap message may notreset immediately. It may take severaldriving cycles for the indicators to turn off.A driving cycle consists of an enginestart-up (after four or more hours with theengine off) followed by normal city andhighway driving.
REFUELING - DIESEL
WARNINGS
Read and follow all the instructionson the pump island.
Stay outside your vehicle and do notleave the fuel pump unattendedwhen refueling your vehicle.
Keep children away from the fuelpump. Never let children pump fuel.
Wait at least 10 seconds beforeremoving the fuel pump nozzle toallow any residual fuel to drain intothe fuel tank.
Do not remove the fuel pump nozzlefrom its fully inserted position whenrefueling.
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Fuel and Refueling

WARNINGS
When refueling always shut theengine off and never allow sparks oropen flames near the fuel tank fillervalve. Never smoke or use a cell phonewhile refueling. Fuel vapor is extremelyhazardous under certain conditions. Avoidinhaling excess fumes.
Stop refueling after the fuel pumpnozzle automatically shuts off for thesecond time. Failure to follow thiswill fill the expansion space in the fuel tankand could lead to fuel overflowing.
The fuel system may be underpressure. If the fuel filler cap isventing vapor or if you hear a hissingsound, wait until it stops before completelyremoving the fuel filler cap. Otherwise, fuelmay spray out and injure you or others.
If you do not use the proper fuel fillercap, excessive pressure or vacuumin the fuel tank may damage the fuelsystem or cause the fuel cap to disengagein a collision, which may result in possiblepersonal injury.
Note:If you must replace the fuel filler cap,replace it with a fuel filler cap designed foryour vehicle. The vehicle Warranty may bevoid for any damage to the fuel tank or fuelsystem if the correct genuine Ford orMotorcraft® fuel filler cap is not used.
Fueling Tips
If air is allowed to enter the fuel system theengine automatically purges any trappedair. To purge the air sooner: prior to enginestart, prime the system by turning the keyto on for 30 seconds then to off. Repeatthis several times. The engine may runrough and produce white smoke while airis in the system. This is normal.
Use only clean, approved containers thatwill prevent the entry of dirt or waterwhenever you store diesel fuel.
Diesel fuel must not be stored in agalvanized container. The fuel will dissolvethe zinc in the galvanized container. Thezinc will then remain in the fuel. If you runthe contaminated fuel through the engine,the zinc will deposit in the fuel injectorscausing expensive-to-repair damage.
Diesel fuel dispensing nozzle fill rate
Your vehicle has a fuel fill pipe that is ableto accept fuel up to 20 gal (76 L) perminute from an 1.2 in (30 mm)fuel-dispensing nozzle. Pumping fuel atgreater flow rates may result in prematurenozzle shut-off or spit back.
Truck stops have pumps and nozzlesdesigned for larger, heavy-duty trucks.When refueling at truck stops: if the nozzleshuts off repeatedly when refueling, wait5–10 seconds; then use a slower rate offlow, do not depress the nozzle trigger asfar.
Refueling
When fueling your vehicle do the following:
1.Fully open the fuel tank filler door untilit engages and remove the fuel tankfiller cap. The fuel tank filler cap hasan indexed design with a 1/4 turnon/off feature. Carefully turn the fillercap counterclockwise until it spins off.
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Fuel and Refueling

2. Insert the fuel pump nozzle up to thefirst notch on the nozzle A. Keep itresting on the cover of the fuel tankfiller pipe opening.
3.Hold the fuel pump nozzle in the lowerposition B when refueling. Holding thefuel pump nozzle in the higher positionA may affect the flow of fuel and shutoff the fuel pump nozzle before the fueltank is full.
4.Slightly raise the fuel pump nozzle andthen slowly remove it.
5. Replace the fuel tank filler cap andclose the fuel tank filler door.
Note: Do not attempt to start the engineif you have filled the fuel tank with incorrectfuel. Incorrect fuel use can cause damagenot covered by the vehicle Warranty. Haveyour vehicle checked immediately.
Dual Fuel Tanks (If Equipped)
Your vehicle may have a dual fuel tankdelivery system which operatesindependently and automatically. The fuelpump in the front fuel tank delivers fuel tothe engine. When the fuel level in the frontfuel tank drops below three quarter full,fuel automatically transfers from the rearfuel tank to the front fuel tank. Wheneverthere is fuel in the rear fuel tank, the frontfuel tank level remains between half andthree quarter full.
Note:If your vehicle runs out of fuel, youmust add fuel to the front fuel tank torestart the engine.
FUEL CONSUMPTION
The advertised capacity is the maximumamount of fuel that you can add to the fueltank after running out of fuel. Included inthe advertised capacity is an emptyreserve. The empty reserve is anunspecified amount of fuel that remainsin the fuel tank when the fuel gaugeindicates empty.
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