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2021 Ford F-150 Owners Manual - Fuel and Refueling



Fuel and Refueling

WARNING: Do not overfill the fuel tank. The pressure in an overfilled tank may cause leakage and lead to fuel spray and fire.

WARNING: The fuel system may be under pressure. If you hear a hissing sound near the fuel filler inlet, do not refuel until the sound stops. Otherwise, fuel may spray out, which could cause serious personal injury.

WARNING: Fuels can cause serious injury or death if misused or mishandled.

WARNING: Fuel may contain benzene, which is a cancer-causing agent.

WARNING: When refueling always shut the engine off and never allow sparks or open flames near the fuel tank filler valve. Never smoke or use a cell phone while refueling. Fuel vapor is extremely hazardous under certain conditions. Avoid inhaling excess fumes.

Follow these guidelines when refueling:

    Extinguish all smoking materials and any open flames before refueling your vehicle.
    Switch the engine off before refueling.
    Automotive fuels can be harmful or fatal if swallowed. Fuel is highly toxic and if swallowed can cause death or permanent injury. If fuel is swallowed immediately call a physician, even if no symptoms are immediately apparent. The toxic effects of fuel may not be apparent for hours.

• Avoid inhaling fuel vapors. Inhaling fuel vapor can lead to eye and respiratory tract irritation. In severe cases, excessive or prolonged breathing of fuel vapor can cause serious illness and permanent injury.

• Avoid getting fuel in your eyes. If you splash fuel in your eyes, immediately remove contact lenses, if worn, flush with water for 15 minutes and seek medical attention. Failure to seek proper medical attention could lead to permanent injury.

• Fuels can be harmful if absorbed through the skin. If you splash fuel on your skin, clothing or both, promptly remove contaminated clothing and thoroughly wash your skin with soap and water. Repeated or prolonged skin contact causes skin irritation.

• Be particularly careful if you are taking Antabuse or other forms of Disulfiram for the treatment of alcoholism. Breathing fuel vapors could cause an adverse reaction, serious personal injury or sickness. Immediately call a physician if you experience any adverse reactions.

Flex fuel vehicles have one of the following identifiers:

• Yellow fuel filler cap.

• Yellow bezel around the fuel filler inlet.

• Yellow fuel filler housing.

• Yellow E85 label on the fuel tank filler door.

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Your vehicle operates on regular unleaded gasoline with a minimum pump (R+M)/2 octane rating of 87 or regular unleaded gasoline blended with a maximum of 85% ethanol (E85).

Some fuel stations, particularly those in high altitude areas, offer fuels posted as regular unleaded gasoline with an octane rating below 87. The use of these fuels could result in engine damage that will not be covered by the vehicle Warranty.

For best overall vehicle and engine performance, premium fuel with an octane rating of 91 or higher is recommended. The performance gained by using premium fuel is most noticeable in hot weather as well as other conditions, for example when towing a trailer. See Towing a Trailer (page 375).

Do not be concerned if the engine sometimes knocks lightly. However, if the engine knocks heavily while using fuel with the recommended octane rating, contact an authorized dealer to prevent any engine damage.

We recommend Top Tier detergent gasolines, where available to help minimize engine deposits and maintain optimal vehicle and engine performance.

For additional information, visit

www.toptiergas.com.

Note: Use of any fuel for which the vehicle was not designed can impair the emission control system, cause loss of vehicle performance, and cause damage to the engine which may not be covered by the vehicle Warranty.

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-based additives, including manganese-based compounds.

• Fuels containing the octane booster additive, methylcyclopentadienyl manganese tricarbonyl (MMT).

• Leaded fuel, using leaded fuel is prohibited by law.

The use of fuels with metallic compounds such as methylcyclopentadienyl manganese tricarbonyl, which is a manganese-based fuel additive, will impair engine performance and affect the emission control system.

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Your vehicle operates on regular unleaded gasoline with a minimum pump (R+M)/2 octane rating of 87.

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Some fuel stations, particularly those in high altitude areas, offer fuels posted as regular unleaded gasoline with an octane rating below 87. The use of these fuels could result in engine damage that will not be covered by the vehicle Warranty.

For best overall vehicle and engine performance, premium fuel with an octane rating of 91 or higher is recommended. The performance gained by using premium fuel is most noticeable in hot weather as well as other conditions, for example when towing a trailer. See Towing a Trailer (page 375).

Do not be concerned if the engine sometimes knocks lightly. However, if the engine knocks heavily while using fuel with the recommended octane rating, contact an authorized dealer to prevent any engine damage.

We recommend Top Tier detergent gasolines, where available to help minimize engine deposits and maintain optimal vehicle and engine performance.

For additional information, visit

www.toptiergas.com.

Note: Use of any fuel for which the vehicle was not designed can impair the emission control system, cause loss of vehicle performance, and cause damage to the engine which may not be covered by the vehicle Warranty.

Do not use:

    Diesel fuel.
    Fuels containing kerosene or paraffin.
    Fuel containing more than 15% ethanol or E85 fuel.
    Fuels containing methanol.
    Fuels containing metallic-based additives, including manganese-based compounds.

• Fuels containing the octane booster additive, methylcyclopentadienyl manganese tricarbonyl (MMT).

• Leaded fuel, using leaded fuel is prohibited by law.

The use of fuels with metallic compounds such as methylcyclopentadienyl manganese tricarbonyl, which is a manganese-based fuel additive, will impair engine performance and affect the emission control system.

Choosing the Right Fuel: Vehicles Operated Where Ultra Low Sulfur Diesel Fuel Is Required (United States/Canada/Puerto Rico/U.S. Virgin Islands And Other Locales)

Note: Your Warranty will not cover damage caused by using an improper type of fuel or fuel additive.

Note: Do not blend used engine oil with diesel fuel under any circumstances.

Blending used oil with the fuel significantly increases your vehicle’s exhaust emissions and reduce engine life due to increased internal wear.

We recommend Top Tier diesel fuel where available to help minimize engine deposits and maintain optimal vehicle and engine performance.

For additional information, visit

www.toptiergas.com.

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You should use ultra-low sulfur diesel fuel designated as number 1-D or 2-D with a maximum of 15-ppm sulfur in your diesel vehicle. You can operate your vehicle on diesel fuels containing up to 20% biodiesel, also known as B20. These fuels should meet the ASTM D975 diesel or the ASTM D7467 B6-B20 biodiesel industry specifications. Outside of North America, use fuels meeting EN590 or equivalent local market standard.

Using low-sulfur diesel fuel (16-500 ppm) or high-sulfur diesel fuel (greater than 500

ppm) in your diesel engine will cause certain emission components to malfunction which could also cause the service engine soon light to illuminate indicating an emissions-related concern.

Diesel fuel is adjusted seasonally for cold temperature. For best results at temperatures below 19°F (-7°C), we recommend using a diesel fuel which has been seasonally adjusted for the ambient conditions.

For the engine to operate reliably on low-sulfur or high-sulfur diesel fuel, the

engine must be a factory-built high-sulfur engine (available as a dealer order option for select markets) or an ultra-low sulfur diesel fuel configured engine that has been retrofitted for high-sulfur diesel fuel using authorized dealer service parts. Failure to use retrofit components other than those available through your authorized dealer results in coolant system damage, engine overheating, selective catalyst reduction system or diesel particulate filter damage and possible base engine damage.

Use only a diesel engine configured for use with high-sulfur diesel fuel in markets with diesel fuel that has sulfur content greater than 15 ppm. Using low-sulfur diesel fuel (16–500 ppm) or high-sulfur diesel fuel (greater than 500 ppm) in a diesel engine designed to use only ultra-low sulfur diesel fuel could result in damage to engine emission control devices and the after treatment system, potentially rendering the vehicle inoperable.

Vehicles with engines configured for use with high-sulfur diesel fuel are only available for sale in countries where

ultra-low sulfur diesel fuel is generally not available or mandated by the government. Vehicles originally sold in an ultra-low sulfur diesel fuel market that are subsequently exported to non-ultra low sulfur diesel fuel markets will need to be retrofitted at the customer’s expense using Ford authorized dealer service parts in order to be reliably operated on non-ultra low sulfur diesel fuel.

WARNING: Do not mix diesel with gasoline, gasohol or alcohol. This could cause an explosion.

Note: Do not use home heating oil, agricultural fuel, raw fats and oils, waste cooking greases, biodiesel greater than 20% or any diesel not intended for highway use. Damage to the fuel injection system, engine and exhaust catalyst, and diesel particulate filter can occur if you use an improper fuel. Red dye is used to identify fuels intended for agricultural and non-highway use.

You can operate your vehicle on diesel fuels containing up to 20% biodiesel, also known as B20.

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Biodiesel fuel is a chemically converted product from renewable fuel sources, such as vegetable oils, animal fats and waste cooking greases.

To help achieve acceptable engine performance and durability when using biodiesel in your vehicle:

    Confirm the biodiesel content of the fuel to be B20 (20% biodiesel) or less.
    Only use biodiesel fuel of good quality that complies with industry standards.
    Follow the recommended service maintenance intervals. See General Maintenance Information (page 602).
    Do not store biodiesel fuel in the fuel tank for more than 1 month.
    Consider changing brands or reducing biodiesel content if you have cold temperature fuel gelling issues or a frequently appearing LOW FUEL PRESSURE message.

Use of biodiesel in concentrations greater than 20% can cause damage to your vehicle, including engine and/or exhaust after-treatment hardware (exhaust catalyst and particulate filter) failures.

Concentrations greater than 20% can also cause fuel filter restrictions that could result in a lack of power or damage to fuel system components, including fuel pump and fuel injector failures.

We recommend SAE 5W-40 oil for fuels with greater than 5% biodiesel (B5). For more information about oil change intervals and other maintenance when operating on biodiesel. See Special Operating Conditions Scheduled Maintenance (page 614).

Look for a label on the fuel pump to confirm the amount of biodiesel contained in diesel fuel. Ask the service station attendant to confirm the biodiesel content of diesel fuel, if you do not see a label on the fuel pump.

If you plan to park or store your vehicle for more than 1 month, then you should empty your vehicle fuel tank of biodiesel fuel. You should fill the tank with a pure

petroleum-based diesel fuel and run your vehicle for a minimum of 30 minutes.

Note: Degraded or oxidized biodiesel can damage fuel system seals and plastics and corrode steel parts.

During cold weather, if you have problems operating on biodiesel, you may need to use diesel fuel with lower biodiesel content, try another brand or discontinue the use of biodiesel.

It should not be necessary to add any aftermarket additives to your fuel if you use a high-quality diesel fuel that conforms to ASTM industry specifications.

Aftermarket additives can damage the fuel injector system or engine.

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.

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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.

The fuel filler funnel is behind the right-hand front seat.

The fuel filler funnel is under the second row right-hand rear seat.

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.

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.

WARNING: Do not dispose of fuel in the household refuse or the public sewage system. Use an authorized waste disposal facility.

When refueling the vehicle fuel tank from a fuel container, use the fuel filler funnel included with your vehicle. See Locating the Fuel Filler Funnel (page 232).

Note: Do not use aftermarket funnels as they may not work with the capless fuel system and can damage it.

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When refueling the vehicle fuel tank from a fuel container, do the following:

    Fully open the fuel filler door.

    Fully insert the fuel filler funnel into the fuel filler inlet.
    Add fuel to your vehicle from the fuel
    Fuel filler door.
    Fuel tank filler valve. C Fuel tank filler pipe.

container.

    Remove the fuel filler funnel.
    Fully close the fuel filler door.
    Clean the fuel filler funnel and place it back in your vehicle or correctly dispose of it.

Note: If your vehicle runs out of fuel add a minimum of 1.3 gal (5 L) of fuel to restart the engine.

Note: You may need to switch the ignition from off to on several times after refueling to allow the fuel system to pump the fuel from the tank to the engine. When restarting, cranking time takes a few seconds longer than normal.

Note: Extra funnels can be purchased from an authorized dealer if you choose to dispose of the funnel.

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    Fully open the fuel filler door.
    Select the correct fuel pump nozzle for your vehicle.

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    Insert the fuel pump nozzle up to the first notch. Keep the fuel pump nozzle resting on the fuel tank filler pipe.
    Hold the fuel pump nozzle in position A when refueling. Holding the fuel pump nozzle in position B can affect the flow of fuel and shut off the fuel pump nozzle before the fuel tank is full.

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    Operate the fuel pump nozzle within the area shown. Refer to A for left hand drive or B for right hand drive.

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    When the pump shuts off, wait 5 seconds, then raise the fuel pump nozzle and slowly remove it.
    Fully close the fuel filler door.

Note: Do not attempt to start the engine if you have filled the fuel tank with incorrect fuel. Incorrect fuel use could cause damage not covered by the vehicle Warranty. Have your vehicle immediately checked.

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    When you stop your vehicle, shift into park (P) and switch the ignition off.

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    Press the button on the left side of the instrument panel next to the headlamp switch to open the fuel filler door. The fuel filler door can take up to 15 seconds to open before you can insert a fuel filler nozzle.
    Select the correct fuel pump nozzle for your vehicle.

    Hold the fuel pump nozzle in position A when refueling. Holding the fuel pump nozzle in position B can affect the flow of fuel and shut off the fuel pump nozzle before the fuel tank is full.

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    Operate the fuel pump nozzle within the area shown. Refer to A for left hand drive or B for right hand drive.

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4. Insert the fuel pump nozzle up to the first notch. Keep the fuel pump nozzle resting on the fuel tank filler pipe.

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    When the pump shuts off, wait 5 seconds, then raise the fuel pump nozzle and slowly remove it.
    Fully close the fuel filler door.

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Note: To close the fuel filler door, press the center rear edge of the fuel filler door and then release.

Complete the refueling process within 20 minutes. If 20 minutes elapses, press the button on the left side of the instrument panel again. Fuel pump nozzle automatic shut off could occur if you do not press the button on the left side instrument panel.

Note: Do not attempt to start the engine if you have filled the fuel tank with incorrect fuel. Incorrect fuel use could cause damage not covered by the vehicle Warranty. Have your vehicle immediately checked.

Your vehicle does not have a fuel tank filler cap.

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    Left-hand side. To open the fuel filler door, press the center rear edge of the fuel filler door and then release.
    Right-hand side. To open the fuel filler door, press the center rear edge of the fuel filler door and then release.
    Left-hand side. Pull the rear of the fuel filler door to open it.
    Right-hand side. Pull the rear of the fuel filler door to open it.

Note: The transmission must be in park (P) or neutral (N).

To manually open the fuel door do the following:

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    Retrieve the emergency opening tool.

Note: The emergency opening tool is with the jack and tool bag. See Changing a Flat Tire (page 516).

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    Insert the emergency opening tool in the position shown and gently pry the fuel door open.

Note: Do not press the fuel filler door release button if the emergency opening tool has been used.

Using the emergency opening tool can cause the tappet to temporarily dislodge from the fuel filler door and remain attached to the fuel filler door opening. If you press the fuel filler door release button after using the emergency opening tool, locate the tappet and reinsert it into the fuel door.

The advertised capacity is the maximum amount of fuel that you can add to the fuel tank after running out of fuel. Included in the advertised capacity is an empty reserve. The empty reserve is an unspecified amount of fuel that remains in the fuel tank when the fuel gauge indicates empty.

Note: The amount of fuel in the empty reserve varies and should not be relied upon to increase driving range.

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The advertised capacity is the maximum amount of fuel that you can add to the fuel tank when the fuel gauge indicates empty.

In addition, the fuel tank contains an empty reserve. The empty reserve is an unspecified amount of fuel that remains in the fuel tank when the fuel gauge indicates empty.

Note: The amount of fuel in the empty reserve varies and should not be relied upon to increase driving range.

    Shift into park (P) or neutral (N).
    Apply the parking brake.
    Fully open the fuel filler door.
    Check the fuel tank filler valve for any debris that may be restricting its movement.
    Remove any debris from the fuel tank filler valve.
    Fully insert a fuel pump nozzle or the fuel filler funnel provided with your vehicle into the fuel filler pipe. See Locating the Fuel Filler Funnel (page 232). This action should dislodge any debris that may be preventing the fuel tank filler valve from fully closing.
    Remove the fuel pump nozzle or fuel filler funnel from the fuel filler pipe.
    Fully close the fuel filler door.

Note: The message may not immediately reset. If the message continues to appear and a warning lamp illuminates, have your vehicle checked as soon as possible.

If it illuminates when you are driving, refuel as soon as possible.

Refueling System Warning(IfEquipped)

If the fuel tank filler valve does not fully close, a message could appear in the information display.

Message

Check Fuel Fill Inlet

If the message appears, do the following:

    Stop your vehicle as soon as it is safe to do so and switch the engine off.

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