
Extended-range fuel tanks are an option for vehicles that enable drivers to go on longer trips without having to worry about refuelling. They are designed to seamlessly integrate with a vehicle, and can be installed by professionals or, in some cases, by the vehicle owner themselves. The tanks are available in a variety of sizes and shapes, and can be customised to fit a vehicle. The cost of an extended-range tank varies, but is generally considered a worthwhile investment for those who drive long distances or travel off-road.
| Characteristics | Values |
|---|---|
| Purpose | To increase the fuel capacity of a vehicle and extend its range. |
| Benefits | Fewer fuel stops, reduced worry of running out of fuel, convenience for long journeys and remote areas, and quicker travel to the destination. |
| Considerations | Cost, weight of the vehicle, space availability, shape and size of the tank, and the process of installation. |
| Installation | May require professional help or can be a DIY project for those skilled with tools and vehicles. |
| Capacity | The capacity added by extended-range tanks varies, with examples ranging from 6.8 gallons to 46 gallons. |
| Compatibility | Extended-range tanks are designed for seamless integration with various vehicles, including Ford, Porsche, Land Rover, Isuzu, Toyota, and Mitsubishi. |
| Fuel Type | Options are available for both gasoline and diesel variants. |
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What You'll Learn
- Extended-range fuel tanks can be worth the money for long-distance travel
- They can be especially useful for off-roading and remote areas
- They can be expensive, but some find them a worthwhile investment
- They can be heavy, but some tanks carry fuel lower in the car
- They can be difficult to install, but some opt for DIY installation

Extended-range fuel tanks can be worth the money for long-distance travel
Extended-range fuel tanks can be a great investment for those who frequently go on long-distance trips. The additional capacity offered by these tanks provides peace of mind and reduces the need for constant refuelling, which can be a hassle, especially when travelling in remote areas.
One of the main advantages of extended-range fuel tanks is the increased mileage they offer. For example, a 28-gallon auxiliary tank can extend the range of a vehicle by 700 miles, while a 6.8-gallon extension can add 156 to 170 miles, depending on the vehicle. This increased range not only reduces the frequency of fuel stops but also saves money on fuel, as you can take advantage of cheaper fuel prices when you have the capacity to fill up with more fuel.
Another benefit of extended-range fuel tanks is the convenience and peace of mind they offer during long-distance travel. With a larger fuel capacity, there is less worry about running out of fuel, which can be a constant concern when travelling in remote areas or on long journeys. This worry is especially relevant for vehicles with small stock tanks, such as the Toyota Tundra, which has a stock tank capacity of 26.4 to 38 gallons, or the Mitsubishi Pajero, which offers only 250 miles per tank.
Additionally, extended-range fuel tanks can be particularly useful for those who enjoy off-roading or overlanding. The extra fuel capacity allows for more extended periods of off-grid exploration without the need to carry extra fuel cans, which take up valuable space and add weight to the vehicle. For some vehicles, such as the Land Rover LR4, an extended-range tank can be the difference between a 20-gallon stock tank and a more comfortable 28-gallon capacity.
While extended-range fuel tanks offer significant benefits, there are a few considerations to keep in mind. Firstly, the cost of these tanks can be substantial, and the installation process may require modifications to the vehicle. Additionally, the weight of the extra fuel needs to be considered, especially for those who track their vehicles or are particular about weight distribution. However, for those who frequently embark on long-distance travel, the benefits of extended-range fuel tanks often outweigh the costs and minor drawbacks.
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They can be especially useful for off-roading and remote areas
Extended-range fuel tanks are an excellent option for off-roading and driving in remote areas. They can significantly increase your vehicle's range, reducing the need for frequent refuelling stops. This is especially useful when venturing off the beaten path, where gas stations may be few and far between.
For example, consider a scenario where you plan to off-road in a remote area for an extended period. With a standard fuel tank, you might need to carry extra fuel cans, which take up valuable space and can be messy and cumbersome to manage. However, with an extended-range fuel tank, you can enjoy greater peace of mind knowing you have the fuel capacity to cover your trip without constantly worrying about refuelling.
The benefits of extended-range fuel tanks are evident in various user testimonials. For instance, a Land Rover LR4 owner upgraded their stock 20-gallon tank to a 28-gallon auxiliary tank, enabling them to travel 700 miles without refuelling. Similarly, another user with a Toyota Tundra doubled their driving range by installing a 46-gallon replacement tank, making it ideal for extended road trips with fewer fuel stops.
Additionally, modern auxiliary tanks often feature electronic monitoring systems, providing real-time updates on fuel levels and transfer status via dashboard integration or smartphone connectivity. This advanced technology ensures that you always have the information you need to make informed decisions about your fuel usage, even in remote locations.
While the cost of upgrading to an extended-range fuel tank can be significant, it may be a worthwhile investment, especially if you frequently drive in remote areas or go on long-distance trips. The added convenience, peace of mind, and reduced refuelling hassles can make it a valuable choice for off-road enthusiasts and remote travellers.
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They can be expensive, but some find them a worthwhile investment
Extended-range fuel tanks can be expensive, but some people find them a worthwhile investment. The cost of an extended-range fuel tank can vary depending on the make and model of the vehicle, the size and type of the tank, and whether it is a custom job. For example, one user on an online forum stated that they paid $2,395 for a 26-gallon extra tank, which works out to be around $900 per ten gallons. Another user paid $1,000 for a new tank for their Land Rover LR4, which increased their mileage range to 700 miles.
The benefits of extended-range fuel tanks are increased fuel capacity and reduced fuel stops, which can be especially useful for those who travel long distances or remote areas, or who have demanding schedules. One user on an online forum stated that their new tank gave them a range of 500 miles per tank, which covered them for two weeks of daily driving. Another user, who installed a 56-gallon tank on their Fuso Expedition vehicle, noted that the larger tank would increase their mileage range and allow them to travel across Africa and Asia without having to refuel as often.
Additionally, some people may find extended-range fuel tanks worthwhile because they can be a more efficient use of space. For example, one user on an online forum mentioned that they replaced their stock round 33-gallon tank with a rectangular 55-gallon tank, which made better use of the space in their vehicle.
However, it is important to consider the potential drawbacks of extended-range fuel tanks. One user on an online forum noted that the larger tanks can be heavy, which could affect the performance of the vehicle. Another user mentioned that they had to modify their vehicle to accommodate the larger tank, which may not be feasible for everyone.
Overall, while extended-range fuel tanks can be a costly investment, some people find the benefits of increased fuel capacity and reduced fuel stops to be worthwhile, especially for those who travel long distances or have unique vehicle requirements.
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They can be heavy, but some tanks carry fuel lower in the car
An extended-range fuel tank is an option available in some cars, such as Porsche, where the tank capacity is increased, allowing drivers to go longer distances without refuelling. These tanks can be heavy, depending on the size and how full they are. For example, a gallon of gasoline weighs around 6.3 lbs, so a larger tank with more fuel will be heavier.
The weight of an extended-range fuel tank can impact the overall weight distribution of the car, which is an important consideration for some drivers, especially those interested in sports or racing cars. Some drivers opt for smaller fuel tanks to save weight, particularly if they are driving in sport mode or on a track, where a lighter car can provide better performance.
However, the placement of the fuel tank in a car is also a factor to consider. In some cars, the extended-range fuel tank carries the fuel lower in the car, which can help lower the centre of gravity. This lower position can improve the car's handling and stability, especially when cornering or driving at high speeds.
The weight of the fuel tank and the fuel it carries can also impact the car's fuel efficiency. A heavier car may consume more fuel to achieve the same performance as a lighter car. Therefore, the decision to opt for an extended-range fuel tank may depend on the driver's priorities, such as the need for a longer range versus the desire for better fuel efficiency or performance.
Additionally, the placement of the fuel tank in a car is influenced by engineering practicality, safety considerations, consumer preferences, and design constraints. The location of the fuel door, for example, is determined by the design of the fuel tank and the car's underbody components, with a focus on ease of integration and packaging.
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They can be difficult to install, but some opt for DIY installation
Installing an extended-range tank can be a challenging task, and it is important to carefully consider the process and potential challenges before attempting a DIY installation. While some car owners opt for professional installation services, others choose to take on the project themselves, which can be a complex process.
For example, when installing an extended-range fuel tank in a vintage Mustang, several steps need to be followed. First, the fuel filler neck may need adjustments or replacements. This involves removing the mounting screws in the taillight panel and separating the filler neck from the fuel filler hose. Next, the trunk must be cleared of all items, including the spare tire, jack, tool kit, and even the trunk mat, to make room for the removal of the old fuel tank. After removing the self-tapping mounting screws and any retaining bolts, the old fuel tank can be carefully lifted out. It is important to note that old sealer might be holding the tank in place, so a small screwdriver or a gentle push from the bottom may be necessary to break it free.
In another example, a user on an online forum shared their experience installing a 56-gallon fuel tank in their Fuso Expedition vehicle. They encountered a challenge due to the new tank not lining up with the existing chassis holes, requiring modifications to be made. This highlights the potential need for customisation and adjustments when installing extended-range fuel tanks.
The installation process for an extended-range fuel tank in a Land Rover LR4 is also noteworthy. The user opted for a 28-gallon auxiliary tank with a dual-input filler neck, allowing them to choose where to fill the fuel. This setup included a transfer pump, enabling the vehicle to cover 700 miles without refuelling.
While DIY installation of extended-range fuel tanks can be challenging, it is not impossible. With careful planning, the right tools, and mechanical knowledge, some car enthusiasts successfully take on this task, enhancing their vehicles' fuel capacity and driving range. However, it is important to approach such installations with caution and consider seeking professional assistance if unsure, as incorrect installations can lead to safety hazards.
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Frequently asked questions
An extended-range tank is an additional fuel tank that increases the capacity of your vehicle, allowing you to travel longer distances without needing to refuel.
Extended-range tanks are connected to the vehicle's fuel system and have a transfer pump that moves fuel from the extended tank to the main tank.
Extended-range tanks reduce the need for frequent refuelling, saving you time and money. They are particularly useful for long-distance travel, off-roading, and remote areas with limited access to fuel stations.
The main disadvantage is the cost of purchasing and installing the additional tank. Additionally, the increased fuel capacity adds weight to the vehicle, which may impact performance and fuel efficiency.
When choosing an extended-range tank, consider the available space in your vehicle, the desired increase in fuel capacity, and the compatibility with your vehicle's fuel system. It is important to consult a professional to ensure safe and proper installation.















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