2025 FORD F-650 Fuel and Refueling User Manual
The 2025 Ford F-650 is the most powerful and capable heavy-duty truck available, making it the ultimate force to be reckoned with on the road. Fuel efficiency and the refilling procedure are crucial components that are sometimes disregarded but are essential to its power. The 2025 Ford F-650 is the pinnacle of efficiency thanks to its precisely calibrated engine and cutting-edge fuel management systems.
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FORD Fuel and Refueling
SAFETY PRECAUTIONS
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: Gasoline 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.
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.
WARNING: Stop refueling after the fuel pump nozzle automatically shuts off for the second time. Failure to follow this will fill the expansion space in the fuel tank and could lead to fuel overflowing.
Observe the following guidelines when handling automotive fuel:
- Extinguish all smoking materials and any open flames before refueling your vehicle.
- Automotive fuels can be harmful or fatal if swallowed. Fuel such as gasoline is highly toxic and if swallowed can cause death or permanent injury. If swallowed, call a physician immediately, even if no symptoms are immediately apparent. The toxic effects of fuel may not be visible for hours.
- Avoid inhaling fuel vapors. Inhaling too much fuel vapor of any kind 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 liquid in your eyes. If you splash fuel in your eyes, 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 also be harmful if absorbed through the skin. If you splash fuel on your skin, clothing or both, promptly remove contaminated clothing and wash your skin thoroughly with soap and water. Repeated or prolonged skin contact with fuel liquid or vapor causes skin irritation.
- Be particularly careful if you are taking “Antabuse” or other forms of disulfiram for the treatment of alcoholism. Breathing gasoline vapors, or skin contact could cause an adverse reaction. In sensitive individuals, serious personal injury or sickness may result. If you splash fuel on your skin, promptly wash your skin thoroughly with soap and water. Consult a physician immediately if you experience an adverse reaction.
Low Fuel Pressure (If Equipped)
Diesel engine vehicles have a low fuel pressure detection system. The following are possible causes for a low fuel pressure warning message to appear in the information display:
- Cold start or during cold operation below 32°F (0°C). If the low fuel pressure message appears during a cold start or up to 10 minutes after the initial cold start, monitor the information display. If the low fuel pressure message disappears and does not re-appear after the engine has fully warmed up, waxed or gelled fuel is what most likely caused the message. Do not use alcohol based additives to correct fuel gelling. This may result in damage to the fuel injectors and systems. Use an anti-gel additive.
Note: The vehicle Warranty may be void if you use additives that do not meet or exceed Ford specifications. If the low fuel pressure message persistently appears after re-fueling and then disappears when the engine has fully warmed up, consider using different fuel sources.
- Low fuel operation: If the low fuel pressure message appears when your vehicle is warm and during low fuel tank level operation (near empty), refuel your vehicle. If the message reappears after fueling, see below. If the message does not come back, the low fuel pressure condition was due to low fuel levels in the fuel tank.
- Normal operation: If the low fuel pressure message appears during normal operation when the engine is fully warm, and fuel level is not low, you must change the fuel filters regardless of the maintenance schedule interval.
- If replacement of the fuel filter does not remedy the low fuel pressure message during normal operation as defined above, take the vehicle to an authorized dealer.
FUEL QUALITY – DIESEL
Fuel Requirements – 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)
You should use Ultra-Low Sulfur Diesel fuel (also known as ULSD) designated as number 1-D or 2-D with a maximum of 15-ppm sulfur in your diesel vehicle. You may 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.
Note: The vehicle Warranty does 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 will significantly increase your vehicle’s exhaust emissions and reduce engine life due to increased internal wear.
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 may also cause the service engine soon light to illuminate indicating an emissions-related concern. Diesel fuel is adjusted seasonally for cold temperatures. For best results at temperatures below 19°F (-7°C), it is recommended to use diesel fuel which has been seasonally adjusted for the ambient conditions.
Fuel Requirements – Choosing The Right Fuel: Vehicles Operated Where Ultra Low Sulfur Diesel Fuel Is Not Required
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 Ford Motor Company dealer service parts. Failure to use retrofit components other than those available through your authorized dealer will result 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 may 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.
Ford Biodiesel Owner’s Manual
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 fuels greater than 20% or any diesel fuel not intended for highway use. Red dye is used to identify fuels intended for agricultural and non-highway use. Damage to the fuel injection system, engine and exhaust catalyst can occur if an improper fuel is used.
You may operate your vehicle on diesel fuels containing up to 20% biodiesel, also known as B20. 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.
- Do not store biodiesel fuel in the fuel tank for more than 1 month
- Consider changing brands or reducing content if you have cold temperature fuel gelling issues or a frequent LOW FUEL PRESSURE message appearing
- Do NOT use raw oils, fats or waste cooking greases
Use of biodiesel in concentrations greater than 20% may 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 may result in a lack of power or damage to fuel system components, including fuel pump and fuel injector failures. SAE 5W-40 or SAE 15W-40 oil is recommended for fuels with greater than 5% biodiesel (B5). Refer to the Special operating conditions section under the Schedule Maintenance chapter for more information about oil change intervals and other maintenance when operating on biodiesel. Look for a label on the fuel pump to confirm the amount of biodiesel contained in a diesel fuel. Biodiesel content is often indicated with the letter B followed by the percent of biodiesel in the fuel. For example, B20 indicates a fuel containing 20% biodiesel. Ask the service station attendant to confirm the biodiesel content of a diesel fuel if you do not see a label on the fuel pump. Biodiesel fuels degrade more easily than diesel fuels not containing biodiesel and should not be stored in the fuel tank for more than 1 month. If you plan to park or store your vehicle for more than 1 month, then you should empty your vehicle fueltank 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 a diesel fuel with lower biodiesel content, try another brand, or discontinue the use of biodiesel.
Diesel Fuel Additives
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 & 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 may result in damage to the fuel injectors and system. The Vehicle Warranty may not cover repairs needed to correct the effects of using an aftermarket product that does not meet Ford specifications in your fuel.
FUEL QUALITY – GASOLINE
Choosing the Right Fuel
Your vehicle is designed to operate on regular unleaded gasoline with a minimum pump (R+M)/2 octane rating of 87. 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. We do not recommend these fuels. 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 180). 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, refer to 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 (commonly known as MMT), which is a manganese-based fuel additive, will impair engine performance and affect the emission control system.
RUNNING OUT OF FUEL – DIESEL
Avoid running out of fuel. This allows air to enter the fuel system and may make it difficult to restart your vehicle.
If your vehicle runs out of fuel:
- Normally adding 4–5 gal (15–19 L) of fuel is enough to restart the engine. If your vehicle is out of fuel and on a steep grade, more than 5 gal (19 L) may be required.
- You must purge trapped air from the system before restarting the engine.
Purging Air From the System
Switch the ignition on for 30 seconds and then switch the ignition off. Repeat this operation six times in a row to purge any trapped air from the fuel system. Any remaining air in the system self-purges when the engine starts. The engine may run rough or produce white smoke when air remains in the fuel system. This is normal and stops after a short period. If the engine continues to run rough, have your vehicle checked as soon as possible.
Starting the Engine
Do not crank the engine for more than 10 seconds as starter damage may occur. If the engine fails to start, switch the ignition off and wait 30 seconds before cranking the engine again.
RUNNING OUT OF FUEL – GASOLINE
Avoid running out of fuel because this situation may have an adverse effect on powertrain components.
If you run out of fuel:
- 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. With keyless ignition, just start the engine. Crank time will be longer than usual.
- Normally, adding 1 gal (3.8 L) of fuel is enough to restart the engine. If the vehicle is out of fuel and on a steep grade, more than 1 gal (3.8 L) may be required.
- The service engine soon indicator may come on.
REFUELING – DIESEL
WARNING: Fuel vapor burnsviolently and a fuel fire can cause severe injuries.
WARNING: Read and follow all the instructions on the pump island.
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.
WARNING: Stay outside your vehicle and do not leave the fuel pump unattended when refueling your vehicle.
WARNING: Keep children away from the fuel pump. Never let children pump fuel.
WARNING: Wait at least five seconds before removing the fuel pump nozzle to allow any residual fuel to drain into the fuel tank.
WARNING: Stop refueling after the fuel pump nozzle automatically shuts off for the second time. Failure to follow this will fill the expansion space in the fuel tank and could lead to fuel overflowing.
WARNING: Do not remove the fuel pump nozzle from its fully inserted position when refueling.
An engine that suddenly becomes noisy or operates poorly after a fuel fill could be using substandard fuel. We recommend that you purchase diesel fuel from a reputable fuel station. Use only clean, approved containers that prevent the entry of dirt or water whenever you store diesel fuel. Do not store diesel fuel in a galvanized container. The fuel dissolves the zinc in the galvanized container. The zinc will then remain in the fuel. If you run the contaminated fuel through the engine, the zinc damages the fuel injectors. Engine damage caused may not be covered by the vehicle warranty.
Use the following guidelines to avoid electrostatic charge build-up when filling an ungrounded fuel container:
- Place the approved fuel container on the ground.
- Do not fill a fuel container while it is in the vehicle (including the cargo area).
- Keep the fuel pump nozzle in contact with the fuel container when filling.
- Do not use a device that would hold the fuel pump handle in the fill position.
Fuel Filler Cap
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.
Note: If you do not use the correct 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 crash. The fuel tank has a threaded fuel filler cap.
Note: If you must replace the fuel filler cap, replace it with a fuel filler cap that is designed for your vehicle. The vehicle warranty may be void for any damage to the fuel tank or fuel system if the correct genuine Ford, Motorcraft or other certified fuel filler cap is not used.
When refueling the vehicle fuel tank do the following:
- Bring your vehicle to a complete stop and shift into neutral (N) or park (P).
- Apply the parking brake and switch the ignition off.
- Turn the fuel filler cap counterclockwise and remove it.
- Refuel your vehicle as required.
- Replace the fuel filler cap, turn it clockwise until you feel a strong resistance.
Fuel Fill Rate
Your vehicle has a fuel fill inlet that is able to accept fuel up to 20 gal (75 L) per minute from a fuel-dispensing nozzle. Pumping fuel at greater flow rates may result in premature nozzle shut off or spit back. Truck stops have fuel pumps and nozzles designed for larger, heavy-duty trucks. If you are refueling your vehicle at a truck stop and the nozzle shuts off repeatedly, wait 5-10 seconds, then use a slower fill rate.
REFUELING – GASOLINE
WARNING: Fuel vapor burns violently and a fuel fire can cause severe injuries.
WARNING: Read and follow all the instructions on the pump island.
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.
WARNING: Stay outside your vehicle and do not leave the fuel pump unattended when refueling your vehicle.
WARNING: Keep children away from the fuel pump; never let children pump fuel.
WARNING: Wait at least 10 seconds before removing the fuel pump nozzle to allow any residual fuel to drain into the fuel tank.
WARNING: Stop refueling after the fuel pump nozzle automatically shuts off for the second time. Failure to follow this will fill the expansion space in the fuel tank and could lead to fuel overflowing.
WARNING: Do not remove the fuel pump nozzle from its fully inserted position when refueling.
Use the following guidelines to avoid electrostatic charge build-up when filling an ungrounded fuel container:
- Place approved fuel container on the ground.
- Do not fill a fuel container while it is in the vehicle (including the cargo area).
- Keep the fuel pump nozzle in contact with the fuel container while filling.
- Do not use a device that would hold the fuel pump handle in the fill position.
Fuel Filler Cap
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: If you do not use the correct 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 crash. Failure to follow this warning could result in serious personal injury.
The fuel tank has a threaded fuel filler cap.
Note: If you must replace the fuel filler cap, replace it with a fuel filler cap that is designed for your vehicle. The vehicle Warranty may be void for any damage to the fuel tank or fuel system if the correct genuine Ford, Motorcraft or other certified fuel filler cap is not used.
When refueling the vehicle fuel tank do the following.
- When your vehicle has stopped, shift into neutral (N) or park (P).
- Apply the parking brake and switch the ignition off.
- Turn the fuel filler cap counterclockwise and remove it.
- Refuel your vehicle as required.
- Replace the fuel filler cap, turn it clockwise until you feel a strong resistance.
If the fuel cap warning lamp or a warning message appears in the instrument cluster, you may not have installed the fuel filler cap correctly.
If the fuel cap warning lamp remains on, at the next opportunity, safely pull off of the road, remove the fuel filler cap, align the cap properly and reinstall it. The check fuel cap warning lamp or warning message may not reset immediately. It may take several driving cycles for the indicators to turn off. A driving cycle consists of an engine start-up (after four or more hours with the engine off) followed by normal city and highway driving.
FUEL CONSUMPTION
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.
Filling the Fuel Tank
For consistent results when refueling:
- Turn the ignition off before fueling; an inaccurate reading results if the engine is left running.
- Use the same fill rate (low-medium-high) each time the tank is filled.
- Allow no more than one automatic shut-off when refueling.
Results are most accurate when the filling method is consistent.
Calculating Fuel Economy
Do not measure fuel economy during the first 1,000 mi (1,600 km) of driving (this is your engine’s break-in period). A more accurate measurement is obtained after 2,000 mi (3,200 km) to 3,000 mi (4,800 km). Also, fuel expense, frequency of fill ups or fuel gauge readings are not accurate ways to measure fuel economy.
- Fill the fuel tank completely and record the initial odometer reading.
- Each time you fill the fuel tank, record the amount of fuel added.
- After at least three fill ups, fill the fuel tank and record the current odometer reading.
- Subtract your initial odometer reading from the current odometer reading.
To calculate L/100 km (liters per 100 kilometres) fuel consumption, multiply the liters used by 100, then divide by kilometres traveled. To calculate MPG (miles per gallon) fuel consumption, divide miles traveled by gallons used. Keep a record for at least one month and record the type of driving (city or highway). This provides an accurate estimate of your vehicle’s fuel economy under current driving conditions. Keeping records during summer and winter will show how temperature impacts fuel economy.
Conditions
- Heavily loading your vehicle reduces fuel economy.
- Carrying unnecessary weight in your vehicle may reduce fuel economy.
- Adding certain accessories to your vehicle such as bug deflectors, rollbars or light bars, running boards and ski racks may reduce fuel economy.
- Using fuel blended with alcohol may lower fuel economy.
- Fuel economy may decrease with lower temperatures.
- Fuel economy may decrease when driving short distances.
- You will get better fuel economy when driving on flat terrain than when driving on hilly terrain.
FUEL TANK SELECTOR SWITCH (IF EQUIPPED)
Your vehicle may have two fuel tanks. The fuel in each fuel tank is independently used. Use the switch on the instrument panel to select the left-hand or right-hand fuel tank. The fuel gauge indicates the remaining fuel in the selected fuel tank.
FAQs
The 2025 Ford F-650 typically runs on diesel fuel, known for its efficiency and power in heavy-duty applications.
The fuel tank capacity of the 2025 Ford F-650 varies depending on the specific configuration but generally ranges from [insert capacity] gallons, providing ample range for long hauls.
The fuel management system in the 2025 Ford F-650 may incorporate technologies such as direct injection and variable valve timing to optimize fuel combustion and reduce consumption.
Fuel economy in the 2025 Ford F-650 is influenced by various factors, including driving habits, load weight, terrain, and vehicle maintenance.
Ford employs rigorous testing and quality control measures to ensure that the fuel system in the 2025 Ford F-650 meets stringent standards for reliability and durability.
Yes, the 2025 Ford F-650 may offer features such as fuel economy displays or onboard computer systems that provide real-time information on fuel consumption and efficiency.
The engine in the 2025 Ford F-650 may utilize advanced fuel injection systems and electronic controls to precisely manage fuel delivery, optimizing performance and efficiency under varying conditions.
Drivers can maximize fuel efficiency in the 2025 Ford F-650 by practicing eco-driving techniques such as maintaining steady speeds, avoiding excessive idling, and properly maintaining the vehicle.
When refueling the 2025 Ford F-650, drivers should turn off the engine, avoid smoking or using electronic devices near the fueling area, and ensure proper grounding to prevent static electricity buildup.
The fuel filler cap design of the 2025 Ford F-650 may incorporate features such as sealing gaskets and vapor recovery systems to prevent fuel leakage and emissions during refueling.
While Ford may not officially endorse specific aftermarket fuel additives, drivers should use caution with to ensure compatibility and effectiveness with the 2025 Ford F-650’s engine and fuel system.
The 2025 Ford F-650 may offer compatibility with alternative fuels such as biodiesel or compressed natural gas (CNG), providing options for environmentally conscious drivers or fleet operators.
The fuel tank design of the 2025 Ford F-650 may be tailored to fit different body configurations and applications, ensuring optimal fuel capacity and distribution for specific needs.
Yes, drivers may have the option to install aftermarket fuel tanks or auxiliary fuel systems in the 2025 Ford F-650 to increase fuel capacity for extended range or specialized applications.
When transporting or storing fuel for the 2025 Ford F-650, drivers should adhere to local regulations and safety guidelines, including proper container labeling, ventilation, and fire prevention measures.
Yes, Ford may offer fuel-related maintenance services such as fuel filter replacement or fuel system inspections as part of the recommended maintenance schedule for the 2025 Ford F-650.
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