Mercedes Mullins
Adding an extra fuel tank to your truck can be a great way to extend your driving range and reduce the worry of running out of fuel, especially when travelling long distances. An auxiliary tank, or transfer tank, is an extra fuel tank that works in tandem with the stock tank and can be mounted beneath or on top of the vehicle. This option is particularly useful when travelling through areas with expensive fuel, as you can stock up when prices are lower. However, there are some drawbacks to consider, such as the weight of the extra tank when full and ground clearance. Additionally, you may need to consider the installation process and any necessary modifications to your vehicle.
| Characteristics | Values |
|---|---|
| Advantages of an extra fuel tank | Extended range, convenience, cost savings, security |
| Reasons to avoid an extra fuel tank | Weight, ground clearance, cost, complexity of installation |
| Types of extra fuel tank | Auxiliary/transfer/add-in tanks, replacement tanks |
| Installation locations | Beneath the vehicle, on top of the stock tank, behind the cab, in the bed, where the spare tire is located |
| Fuel tank brands | Transfer Flow, TITAN, LRA, Dee Zee, RDS |
| Fuel tank capacities | 15 gallons, 26 gallons, 40 gallons, 45 gallons, 52 gallons, 56 gallons, 80 gallons, 110 gallons, 130 gallons, 150 gallons, 220 gallons |
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What You'll Learn
Cost and savings
The cost of installing an extra fuel tank on your truck varies depending on the size and type of the tank, as well as the make and model of your truck. For example, a 15-gallon auxiliary fuel tank costs around $175, while a 45-gallon replacement tank can be a more expensive option. Larger tanks, such as those with capacities of 150 gallons or more, will likely cost even more.
When considering the cost of installing an extra fuel tank, it is also important to factor in the potential savings. Auxiliary fuel tanks can provide significant savings by allowing you to stock up on less expensive fuel and avoid buying fuel at stations with higher prices. For example, one truck owner reported saving money by filling up in a different state, where diesel prices were lower.
Additionally, the extended range offered by auxiliary fuel tanks can reduce the need for frequent refueling, especially during long-distance travel. This can save both time and money, as you can avoid fuel stations with limited options or high prices.
While the initial cost of installing an extra fuel tank may be significant, the long-term savings can make it a worthwhile investment, especially for those who drive long distances or travel frequently. The ability to choose where to refuel and take advantage of cheaper fuel prices can offset the cost of the tank over time.
However, it is important to consider the weight of the extra fuel, which can impact ground clearance and axle weight. This may influence fuel efficiency and could potentially offset some of the savings gained from purchasing cheaper fuel. Overall, while there may be some trade-offs, installing an extra fuel tank can provide cost savings and greater flexibility for truck owners.
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Weight and ground clearance
When considering installing an extra fuel tank on your truck, it is important to take into account the weight and ground clearance implications.
The weight of the extra fuel tank and the fuel it carries can be a significant factor affecting your decision. Some truck owners have expressed concerns about their trucks running close to the maximum rear axle weight, and the extra weight of a larger fuel tank might push it over the limit. This could affect the truck's handling and performance, potentially leading to safety issues. Therefore, it is crucial to consider the truck's weight ratings and ensure that the additional weight of the fuel tank does not exceed the recommended limits.
Additionally, ground clearance is another important consideration. Some auxiliary fuel tanks may sit below the frame rails of the truck, reducing ground clearance. This could become a problem when encountering obstacles such as speed bumps, uneven terrain, or when driving off-road. A lower ground clearance increases the risk of the fuel tank sustaining damage from road debris or scraping against surfaces.
To mitigate the impact on ground clearance, some manufacturers offer wedge-shaped auxiliary fuel tanks that maximize trailer clearance while providing additional fuel capacity. These tanks typically carry more fuel than low-profile versions as the top portion extends above the bed height. However, even with these specialized tank designs, the overall increase in weight and decrease in ground clearance due to the installation of an extra fuel tank are important factors to consider before making a decision.
While the extra fuel capacity can provide benefits in terms of extended range and cost savings, it is crucial to carefully evaluate the potential impact on the truck's weight and ground clearance to ensure safe and efficient operation.
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Size and placement
The size and placement of an extra fuel tank on your truck will depend on several factors, including the make and model of your truck, your intended use, and any weight considerations.
Firstly, it is important to consider the make and model of your truck when deciding on the size and placement of an extra fuel tank. Different truck models will have different available spaces for fuel tanks, and the fuel tank options will vary accordingly. For example, one user with a 2011 Chevy 3500 HD mentioned that their 52.5-gallon replacement tank extended under the driver's side passenger seat, requiring an extra support bracket. Another user with a Ford F-250 mentioned the possibility of installing an extra tank in the bed of the truck or changing the existing tank for a larger one.
Secondly, the intended use of your truck will influence the size and placement of the extra fuel tank. If you plan to travel long distances or go camping, as one user mentioned in preparation for a trip to Alaska, you may want to consider a larger fuel tank or an additional tank to increase your range and reduce the worry of running out of fuel.
Thirdly, weight considerations will play a role in your decision. A larger fuel tank or an additional tank will increase the overall weight of your truck, which can impact ground clearance and rear axle weight. One user mentioned that their 56-gallon replacement diesel tank sits approximately one and a half inches below the frame rails of the truck, affecting ground clearance. Another user with a single rear wheel truck chose not to install a larger fuel tank due to concerns about handling the extra weight.
When deciding on the size and placement of an extra fuel tank, it is also worth noting that auxiliary fuel tank systems are designed to fit seamlessly with your truck. Brands like Dee Zee and RDS offer tanks that can be shaped to fit snugly in the truck bed or underneath, without requiring significant modifications to the vehicle's configuration.
Finally, when considering the size of the extra fuel tank, it is important to be aware of any relevant regulations or rules, such as DOT rules for additional fuel tanks in the United States. Additionally, you may need to consider any computer modifications that might be necessary for recalibrating the "miles to empty" calculation with a larger fuel tank.
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Installation process
Installing an extra fuel tank in your truck can provide peace of mind for diesel truck owners who are planning to drive their pick-up trucks on extended trips, ensuring they have enough fuel for emergency situations.
Step 1: Prepare the Truck
Ensure your truck is parked on a flat surface and engage the parking brake. If you need to lift the truck, use a high-rated jack to safely lift the vehicle and place appropriately sized jack stands on flat portions of the vehicle's frame. Do not get under the vehicle when it is only supported by the jack.
Step 2: Place the Auxiliary Fuel Tank
With an extra set of hands, lift the auxiliary fuel tank and place it into the bed of your truck. Ensure the tank is positioned away from the sides, front, and back of the bed, allowing space on all four sides to prevent the tank from rubbing against the truck bed and causing potential damage.
Step 3: Mark the Mounting Locations
Visibly mark the holes where you will attach the fuel tank to the truck bed. Use a brightly coloured marking tool such as a wax pen or chalk to avoid drilling mistakes.
Step 4: Drill the Holes
After marking the locations, remove the auxiliary fuel tank from the truck bed. Centre punch the marked locations to prevent the drill bit from straying. Start by drilling small pilot holes, then use a larger bit to drill the final holes, ensuring they match the size of the bolts you will use. Before drilling, check the undercarriage of the truck bed to avoid drilling into other components, such as the existing fuel tank.
Step 5: Determine the Fuel Supply Line Route
Decide how and where you will run the rubber fuel supply line from the new tank to the existing factory fuel tank. This may involve drilling another hole in the truck bed or accessing the bottom side of the truck bed through the rubber plugs in the corners of the truck bed.
Step 6: Bolt the Tank into Place
Place the auxiliary fuel tank back into position and use bolts, nuts, and washers to securely fasten the tank in place. An extra pair of hands can be helpful to hold the nuts or bolts in place while tightening them.
Step 7: Connect the Fuel Supply Line
Connect the rubber fuel supply line from the new tank to the factory fuel tank filler neck, following the route determined in Step 5. Ensure all connections are secure to avoid fuel leaks.
Step 8: Prime the Fuel Filter (if applicable)
If you are using an inline fuel filter, remove it and fill it with diesel fuel before installing it. Then, fill your new auxiliary fuel tank with diesel fuel.
Step 9: Test the Installation
Once the auxiliary fuel tank is installed and connected, test it by filling it with diesel fuel and ensuring there are no leaks. Refer to the manufacturer's instructions or a mechanic for proper usage and maintenance guidelines.
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Brand and model
If you're considering installing an extra fuel tank on your truck, there are a variety of brands and models to choose from. Here are some options to consider:
Transfer Flow
Transfer Flow offers a range of aftermarket fuel tank systems made from high-quality aluminized steel for superior durability and strength. Their tanks are powder-coated black for a durable finish and come with all the necessary parts for installation, including straps and mounting hardware. Transfer Flow's fuel tanks are designed to meet the needs of demanding drivers, providing an extended driving range and reducing the need for frequent fuel stops. They offer a range of capacities, including 45-gallon, 50-gallon, and 58-gallon options, and their products are 50-state legal for gasoline.
Zip's AW Direct
Zip's AW Direct offers high-capacity, baffled aftermarket fuel tanks designed to fit in the bed or between the frame rails of most light-duty pickups and service vehicles. Their tanks meet federal requirements and include mounting hardware. Zip's AW Direct offers a 50/50 split refueling tank system, which is Department of Transportation (DOT) legal for carrying and transferring gasoline, diesel, and kerosene. The system includes two 50-gallon tanks, refueling pumps, hoses, nozzles, wire harnesses, and more. They also offer a 40-gallon refueling tank system with similar features, which is also DOT-approved for gasoline, diesel, and kerosene.
Titan
Titan offers a 52.5-gallon replacement fuel tank that can be installed in certain truck models. This tank includes an optional off-road skid sleeve for added protection. The tank utilizes the existing mounts and sensors, with minimal adjustments needed for a secure fit.
When considering an extra fuel tank, it's important to keep in mind factors such as weight, ground clearance, and any relevant regulations or restrictions. Additionally, some tanks may require additional components, such as transfer pumps or valves, for proper functionality. It is always advisable to consult with professionals and review any relevant guidelines before making modifications to your vehicle.
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Frequently asked questions
Installing an extra fuel tank on your truck can extend your driving range and reduce the number of stops for refueling during long trips. It can also save you money by allowing you to buy fuel in locations with lower prices.
Yes, one drawback is the additional weight of the fuel tank, especially when it is full. This can affect the ground clearance of your truck. Another consideration is the installation process, which may require modifications to your truck's configuration.
There are several options available for adding an extra fuel tank to your truck. You can choose between auxiliary tanks, also known as "transfer" or "add-in" tanks, which work in tandem with the stock fuel tank, or you can opt for a larger replacement tank. Brands like Transfer Flow, TITAN, and Dee Zee offer custom-crafted tanks that fit specific truck models.
