
The fuel tank capacity of a vehicle varies depending on its model and manufacturer. For instance, the BMW 7 Series has a fuel tank capacity of 74 litres, while the Ford F-250 and F-350 7.3L models have fuel tanks that range from 26 to 48 gallons. Some vehicle owners seek to modify their fuel tanks to increase capacity and reduce the need for frequent refuelling during long-distance travel or when towing heavy loads.
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What You'll Learn

Ford F250/F350 7.3L fuel tank replacement options
Owners of Ford F250 and F350 trucks with 7.3L engines often express a desire for larger fuel tanks than those provided by Ford. This is due to the relatively small capacity of the standard fuel tanks, which can make long-distance travel and towing more difficult and time-consuming. While some newer models of the F250 and F350 have larger fuel tanks than their predecessors, there is still a demand for aftermarket options that can provide even greater fuel capacity.
There are several replacement fuel tank options available for the Ford F250 and F350 7.3L that can increase fuel capacity and improve driving range. One option is the 60-gallon replacement fuel tank offered by S&B, which is compatible with the 1999-2007 Ford F250 and F350 Powerstroke 7.3L Crew Cab Short Bed models. This tank directly replaces the OEM 29-gallon tank and offers a simple installation process without the need for any cutting, drilling, or special modifications. With nine gallons more capacity than competitor tanks, it provides a greater range and reduces the frequency of refuelling. Additionally, the tank features a built-in sump that can accommodate an aftermarket lift pump if desired.
Another option for the Ford F250 and F350 Super Duty short bed, crew cab pickups with 7.3L engines is the Transfer Flow 58-gallon fuel tank system. This aftermarket fuel tank is the first of its kind and is legal in all 50 states. It has passed extensive emissions testing and has been granted an Executive Order from the California Air Resources Board. The Transfer Flow tank is constructed from 12-gauge aluminized steel, providing superior strength and corrosion resistance. It includes exterior fuel lines and an advanced evaporative emission system, ensuring compliance with environmental standards. The tank also features internal baffles for added durability and reduced fuel sloshing. This option provides a complete installation kit, making it ready for installation and road use.
It is worth noting that some owners of the Ford F250 and F350 7.3L have considered alternative solutions, such as utilising the aft tank that comes with the diesel models or sourcing a factory 48-gallon tank from a CCLB model. However, these options may not be feasible for all owners, especially those with specific configurations or preferences. Therefore, the aftermarket replacement fuel tanks mentioned above present viable solutions for those seeking increased fuel capacity and improved driving range for their Ford F250 and F350 7.3L trucks.
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Fuel tank capacity for long-distance travel
When it comes to long-distance travel, fuel tank capacity is a crucial consideration. Having a sufficient fuel supply can provide peace of mind and reduce the need for frequent refuelling stops, allowing you to focus on enjoying your journey. Here are some insights and options to enhance your fuel tank capacity for long-distance travel:
Understanding Fuel Tank Capacity
The fuel tank capacity of your vehicle is an important specification to be aware of, especially when planning long-distance travel. Different vehicles have varying default fuel tank sizes, and understanding the capacity of your specific model can help you plan your refuelling strategy. It is worth consulting your vehicle's user manual or seeking advice from automotive experts familiar with your car's make and model.
Considerations for Long-Distance Travel
Long-distance travel often involves covering significant distances between refuelling stations, and a larger fuel tank can provide several benefits. Firstly, it grants you greater range, reducing the frequency of fuel stops and giving you more flexibility in choosing your routes. This can be especially advantageous in remote areas where fuel stations may be scarce. Additionally, a larger fuel tank can save you time by minimising refuelling stops, allowing you to reach your destination faster and making your long-distance travels more enjoyable and efficient.
Options for Enhancing Fuel Tank Capacity
If you're seeking to increase your vehicle's fuel tank capacity, there are a few options available:
- Replacement Fuel Tanks: You can opt for a replacement fuel tank with a higher capacity. Companies like S&B offer replacement fuel tanks that can directly replace the original equipment manufacturer (OEM) tank, providing a hassle-free installation process and increased capacity.
- In-Bed & Auxiliary Tanks: These tanks are installed in the bed of your truck, providing a convenient way to refuel without having to visit a fuel station. This option is particularly useful for vehicle owners who use specialised equipment that requires refuelling.
- Bed-Mounted Transfer Tanks: Transfer tanks are another alternative to enhance fuel capacity. These tanks are mounted in the bed of your vehicle, offering additional fuel storage without modifying the stock tank.
- Aftermarket Options: Depending on your vehicle, there may be aftermarket options available to upgrade your fuel tank capacity. For example, some Ford F-250 owners have discussed replacing their stock tanks with larger capacities, such as 60-gallon options.
Planning and Safety Considerations
While enhancing your fuel tank capacity can provide benefits for long-distance travel, it is important to consider safety and practicality. Ensure that any modifications to your fuel tank are compliant with local regulations and performed by qualified professionals. Additionally, be mindful of the weight distribution and overall weight of your vehicle, especially when towing or carrying heavy loads. Always follow the recommendations provided by your vehicle's manufacturer to ensure safe and optimal performance.
By considering your fuel tank capacity and exploring the available options, you can better prepare for long-distance travel, ensuring a more seamless and enjoyable journey.
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Fuel tank size for Ford F-150
The fuel tank size of the Ford F-150 varies depending on the model year and configuration. For example, the 2023 Ford F-150 has a fuel tank capacity of 26 gallons across all models, offering a driving range of up to 676 miles on a single tank of gas under ideal conditions.
Now, let's delve into the fuel tank sizes for different model years of the Ford F-150. For the 2021 and 2022 model years, there seems to be some variation in fuel tank capacity based on different trim levels and configurations. Some owners of the 2021 and 2022 Ford F-150 have mentioned a 36-gallon fuel tank capacity, while others have indicated a 30.6-gallon tank for the PowerBoost model due to the extra space required for the lithium battery.
For the 2017 Ford F-150 Lariat Supercrew, there appears to be a discrepancy in fuel tank sizes. While some sources indicate a 23-gallon tank as the only option, others have mentioned a 32-gallon or a 36-gallon tank.
Moving on to the 2020 Ford F-150, there is a mention of a standard 48-gallon fuel tank for the CCLB 7.3 model. This larger fuel tank capacity is also offered as an option for the smaller tundras and F-150s, providing greater range, which is beneficial when towing.
In summary, the fuel tank size for the Ford F-150 ranges from 23 to 48 gallons, depending on the model year and specific configuration. It's always a good idea to refer to the vehicle's specifications or consult a Ford dealership to confirm the exact fuel tank capacity for a particular model year and trim level.
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Fuel tank accessories
Fuel Caps
High-quality fuel caps, such as those offered by XDP, ensure a secure and reliable seal for your fuel tank, preventing leaks and protecting your fuel from contaminants.
Fuel Sumps and Suction Tubes
Fuel sumps and suction tubes are accessories that facilitate the installation of aftermarket lift pumps. They eliminate the need to drop the fuel tank during the installation process, making it more accessible and cost-effective.
Transfer Tanks and Plumbed Systems
If you require additional fuel capacity, consider installing a transfer tank in the bed of your vehicle. Transfer tanks can be plumbed into the stock tank, providing you with extended range and reducing the frequency of fuel stops. This is an excellent option for those who tow trailers or RVs and need a more efficient fuelling solution.
Fuel Tank Gauges
Fuel tank gauges, such as leak gauges, thickness gauges, and level gauges, provide critical information about your fuel tank's condition and fuel level. These gauges help you monitor for leaks, ensure adequate fuel levels, and maintain the optimal thickness of the tank walls.
Safety Accessories
Various safety accessories are available for fuel tanks, including safety pumping systems, spill kits, and safety products. These accessories help prevent accidents, contain spills, and protect you and the environment in the event of a fuel-related incident.
When upgrading or maintaining your fuel tank, consider the range of accessories available to enhance your vehicle's performance, safety, and convenience. Remember to consult with professionals and follow manufacturer instructions for proper installation and usage.
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Fuel tank installation
Planning and Preparation:
Firstly, it is crucial to refer to local regulations and guidelines regarding fluid storage and conduct any necessary risk assessments. Allocate a safe installation area on firm, level ground, away from potential health and safety hazards and residential or office buildings. Place the tank on a paved or asphalt surface to aid in pollution prevention and ensure it remains level for safe usage. Have the necessary safety response equipment readily available, such as powder, foam, or spill response products. Assess how the tank will be used, by whom, and ensure that all operators are competent in handling the tank and safety equipment.
Installation Process:
Western Global fuel tanks are designed to be ready for installation onsite, with setup taking only a few hours. Any additional features, such as pumps or gauges, are fixed to the tank before delivery. Their TransCube Global and FuelCube models offer double-walled tanks with removable inner tanks. When installing a replacement fuel tank, ensure it fits securely in the factory location. For instance, S&B's 60-gallon fuel tank is designed to directly replace the OEM 29-gallon tank without any cutting, drilling, or special modifications, resulting in a faster and trouble-free installation process.
Post-Installation:
Once the installation is complete, it is time to add fuel to the tank. Western Global tanks are designed to be filled to a 95% capacity, known as the tank safe fill. Ensure you fill the tank adequately to prime pumps and/or feed lines. Always follow the regulations provided by the authorities in your jurisdiction, as they take precedence over general guidelines.
It is important to note that fuel tank installation may vary depending on the specific vehicle, fuel tank manufacturer, and local regulations. Always refer to the manufacturer's instructions and local guidelines for a safe and compliant installation process.
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Frequently asked questions
A 7 fuel tank is a reference to a fuel tank for a vehicle with a 7.3L engine.
Ford F250, F350, F450, and F550 Super Duty vehicles with 7.3 Powerstroke Diesel Engines use 7 fuel tanks.
The stock capacity of a 7 fuel tank is 26 or 34 gallons. However, replacement fuel tanks are available with capacities ranging from 45 to 70 gallons.
7 fuel tanks and replacement tanks can be purchased from automotive retailers such as XDP, S&B, and Transferflow.











































