The Best Auxiliary Fuel Tanks for Pickup Trucks, Tested

Adding an auxiliary fuel tank to your pickup truck can significantly extend your range and improve fuel management on long journeys or job sites. Whether you’re a off-road enthusiast, a contractor, or someone who frequently travels through remote areas, selecting the right auxiliary tank is crucial for safety, durability, and convenience.

In this guide, you’ll find detailed reviews of some of the best auxiliary fuel tanks available on Amazon, each designed with specific features to meet different needs. From compact, portable tanks to large-capacity systems with transfer capabilities, we’ve covered options suitable for various applications and budgets.

RDS Aluminum 74551 20 Gal Rectangular Auxiliary Fuel Tank – Durable and US-Made

This 20-gallon rectangular auxiliary fuel tank from RDS MFG INC is an excellent choice for pickup owners seeking a durable, reliable fuel extension. Constructed from heavy-duty aluminum, it offers resistance to rust and corrosion, ensuring longevity in tough conditions.

Each tank is 100% pressure tested and submerged to check for leaks, which guarantees you a safe, leak-free experience. The fully welded seams enhance the tank’s durability, reducing the risk of failure over time. Heavy-duty aluminum mounting brackets make installation straightforward and secure, minimizing vibrations and movement while driving. Being made in the United States also ensures quality control and adherence to safety standards, giving you peace of mind on the road.

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• Tank 100% pressure tested and submerged to test for leaks
• Fully welded seams
• Heavy-duty aluminum mounting brackets
• Country of Origin : United States

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RDS MFG INC RDS 72551 91 Gal Rectangular Transfer Liquid Tank – Large Capacity for Extended Trips

If you’re looking to maximize your fuel capacity, this 91-gallon rectangular tank from RDS MFG INC offers substantial volume for long hauls. Designed to transport diesel, gasoline, or aviation fuel, it provides flexibility for different fuel types depending on your needs.

The tank measures 55 inches in length, 20 inches in width and height, making it suitable for installation in various pickup models. Its ability to gravity-feed diesel simplifies refueling in remote locations. The fully welded seams and aluminum construction ensure durability and resistance to rust, making it a reliable choice for demanding environments.

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• RDS Rectangular Transfer Fuel Tank
• Can Transport Diesel Fuel, Gasoline, or Aviation Fuel
• Can Gravity Feed Diesel Only
• Capacity: 91 Gallons
• Overall Dimensions: 55"L x 20"W x 20"H

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RDS Fuel Transfer/Auxiliary Tank with 8 GPM Pump – Versatile and Efficient

This 60-gallon auxiliary tank from RDS MFG INC is specially designed for transfer and auxiliary fueling with the added convenience of an 8 GPM pump. Its fully welded seams and aluminum construction ensure durability and rust resistance, making it suitable for rough conditions.

The spin collar feature allows for easy pump installation, enabling quick setup and maintenance. The included pump makes transferring fuel effortless, reducing manual effort and potential spills. It’s an ideal option if you need to frequently transfer fuel between tanks or supply fuel during extended trips.

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• Fully welded seams
• Heavy-duty aluminum mounting brackets
• Spin collar allows for easy pump installation

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RDS MFG INC 71083 45-Gallon Auxiliary/Transfer Fuel Tank – Compact and Reliable

This 45-gallon rectangular auxiliary tank offers a balance between capacity and size, making it suitable for a wide range of pickup trucks. Its fully welded aluminum construction ensures durability and rust resistance, ideal for frequent use and harsh environments.

Gasoline auxiliary fueling is possible by siphoning from the top with an electric pump, adding flexibility for different fueling scenarios. The tank’s design allows for secure mounting and easy access, keeping your fuel supply safe and convenient during long trips or workdays.

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• RDS offers a full assortment of tanks in various capacities and dimensions to fit your needs
• Gasoline auxiliary fueling is allowed, if siphoned from the top of the tank by using an electric fuel pump
• Fully welded seams for durability
• Aluminum Tank – NO RUSTING

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RDS MFG INC 73200 Small Fuel Transfer Tank – Compact and Leak-Proof

This small, 20-gallon transfer tank from RDS MFG INC is perfect for quick fuel transfers or as a portable backup fuel supply. It has been pressure tested and submerged to verify its leak-proof integrity, ensuring safe handling of fuel in transit.

The fully welded aluminum construction and heavy-duty mounting brackets make it robust enough to withstand rough handling in off-road or worksite environments. Its compact size makes it easy to store and transport, making it an excellent addition to your vehicle or toolbox.

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• Tank 100% pressure tested and submerged to test for leaks
• Fully welded seams
• Heavy-duty aluminum mounting brackets

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RDS MFG INC 71791 91-Gallon Rectangular Transfer Liquid Tank – Large and Dependable

Offering a massive 91-gallon capacity, this rectangular transfer tank is designed for serious fuel needs. While it doesn’t include a pump, it can be siphoned from the top with an electric pump for efficient transfer. Its dimensions make it compatible with some short-bed pickups, but measuring your truck is recommended before purchasing.

The fully welded seams and aluminum material ensure durability and rust resistance, making it a long-lasting solution for extended trips or commercial use. Note that this tank does not come with a pickup tube, pump, hose, or nozzle, so you’ll need to acquire those separately.

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• RDS offers a full assortment of tanks in various capacities and dimensions to fit your needs
• Gasoline auxiliary fueling is allowed, if siphoned from the top of the tank by using an electric fuel pump
• Item contains only tank, no pick up tube, pump, hose or nozzle
• Fits some short beds; measure before ordering

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Porotmotor Motorcycle Auxiliary Fuel Tank – Compact Precision Tuning Tool

This 500ml auxiliary fuel tank from porotmotor is a specialized tool designed for small engine work and carburetor tuning. Its compact size allows for precise fuel delivery during engine testing or adjustments, making it an invaluable addition for mechanics and hobbyists alike.

Equipped with a vent, air inlet, and control valve, it offers smooth, safe fuel flow and easy handling. Its versatile design allows it to be hung on a handlebar or placed on a workbench, providing flexibility during maintenance tasks.

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• 【Essential Tool for Small Engine Work and Carburetor Tuning】 The Motorcycle Auxiliary Fuel Tank (500ml with Vent) is an indispensable tool for small engine work and carburetor tuning. It enables the testing of engines before final assembly and offers a convenient solution for precise carburetor adjustments.
• 【Versatile Usage and Precise Control】 With its ability to bypass the tank and deliver clean fuel directly to the carburetor, this auxiliary tank is a valuable tool for working on motors. It enables accurate carburetor adjustments and tuning, thanks to the valve and scale lines that allow you to control the flow of fuel.
• 【Convenient and Safe Design】 This auxiliary tank is designed for easy access and control during engine work, allowing you to securely hang it on the handlebar or bench vice. By using this tank, you can eliminate the risk of accidentally dropping your main fuel tank, creating a safer working environment. Additionally, the fuel tank is equipped with an air inlet on the cap to ensure balanced internal and external air pressure for reliable and smooth gasoline flow.
• 【Durable and Reliable Garage Tool】 Crafted from high-quality materials, this auxiliary tank is durable and reliable. It serves as an essential tool for maintenance and repairs, making it a dependable choice for garage use. Its durability ensures long-lasting performance and reliable fuel delivery.
• 【Note】Before adding fuel to the auxiliary fuel tank, please ensure to follow these precautions: 1.Verify valve closure: Double-check that the fuel valve is tightly closed before adding fuel. This prevents any fuel from flowing out or leaking during the refueling process. 2. Check connection clamps: Inspect all connection points between the auxiliary fuel tank and the equipment. Ensure that any clamps or fasteners are securely tightened to prevent fuel leaks or disconnections while adding fuel. 3.Any problem please contact us, we will give you a satisfactory solution!

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RDS MFG INC 72548 Fuel Transfer Tank – Versatile and Portable

This 60-gallon transfer tank combines size and portability, making it suitable for various fuel transfer tasks. Its robust construction and fully welded aluminum seams ensure durability, while its design makes it easy to install and use in different vehicles.

It’s ideal for transferring fuel during long trips or for use in remote locations where refueling options are limited. The tank’s versatility allows it to handle different fuel types and transfer needs, making it a practical addition to your vehicle setup.

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• Product Type:Auto Accessory
• Item Package Dimension:53.34 Centimeters L X 53.34 Centimeters W X 142.24 Centimeters H
• Country Of Origin: United States
• Item Package Weight:54.431 Kilograms

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Buyer’s Guide: What to Consider

Choosing the right auxiliary fuel tank involves assessing your specific needs, available space, and usage scenarios. By considering key factors such as capacity, material, transfer features, and size, you can select a tank that enhances your vehicle’s fuel capacity efficiently and safely.

• Capacity: Evaluate how much additional fuel you need to carry based on your typical trips or work demands. Larger tanks offer more range but also add weight and size considerations.
• Material and Durability: Opt for tanks made from corrosion-resistant materials like aluminum or reinforced steel. Fully welded seams and rust-proof coatings enhance durability for long-term use.
• Transfer Capabilities: Consider whether you need a tank with built-in pumps or transfer features to facilitate easy fueling or fuel transfer between tanks.
• Size and Fit: Measure your truck's available space to ensure the tank will fit properly. Compatibility with short or long beds and mounting points is crucial.
• Fuel Type Compatibility: Check if the tank supports your intended fuel type, whether gasoline, diesel, or aviation fuel, and whether siphoning or gravity feed is possible.
• Ease of Installation: Look for tanks with mounting brackets and features that simplify installation, especially if you plan DIY setup.
• Additional Features: Features like vents, control valves, and portability options can significantly enhance the usability and safety of your auxiliary tank.

Conclusion

Adding an auxiliary fuel tank to your pickup truck can dramatically improve your range and operational flexibility, especially during long trips or remote work. The options reviewed here offer a variety of capacities, features, and price points to suit different needs.

Whether you require a compact tank for small engine tuning or a large-capacity transfer tank for extended travel, selecting a model built with durability and safety in mind is essential. Take your measurements, evaluate your fuel requirements, and choose a tank that fits your vehicle and your lifestyle best.