The Best Auxiliary Fuel Tanks for Pickup Trucks, Reviewed

If you’re a pickup truck owner who regularly needs extra fuel capacity for long trips, work sites, or off-road adventures, choosing the right auxiliary fuel tank is essential. A reliable, durable, and easy-to-install tank can significantly extend your range and improve your productivity.

In this review, we’ll explore some of the best auxiliary fuel tanks available on Amazon, focusing on their features, capacity, build quality, and overall value. Whether you need a simple tank for gasoline or a versatile toolbox combo for mixed fuels, you’ll find options tailored to your specific needs.

RDS MFG INC – 72548 Fuel Transfer Tank/Auxiliary Fuel Tank/Toolbox Combo – 60 Gallon

This 60-gallon combo tank from RDS MFG INC offers a comprehensive solution for those needing both fuel storage and extra toolbox space. Its sturdy construction and US-made design make it a popular choice among professional and recreational users alike. The tank’s dimensions, measuring 53.34 centimeters in length and width with a height of 142.24 centimeters, allow it to fit well in most truck beds without overly compromising space.

The product’s heavy-duty build ensures durability, and the integrated toolbox provides convenient storage for tools and accessories, making it ideal for work crews or off-road enthusiasts. The 54.431-kilogram weight signifies a robust steel or aluminum construction, designed to withstand harsh conditions.

Its 60-gallon capacity makes it suitable for extended trips, and the toolbox’s integrated design keeps everything organized and accessible. Installation is straightforward, thanks to the robust mounting hardware and clear instructions, though the size requires some planning for fitting in smaller beds.

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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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RDS Fuel Transfer/Auxiliary Tank/Toolbox Combo with 8 Gpm Pump – 60-Gal. Capacity

This RDS model combines a 60-gallon auxiliary tank with a built-in toolbox and an 8 GPM pump, making it an excellent choice for those who need quick refueling capabilities combined with storage. The tank’s fully welded seams and heavy-duty aluminum mounting brackets ensure long-lasting performance and resistance to corrosion.

The spin collar feature simplifies pump installation, allowing you to set up the transfer pump without extensive modifications. The 8 GPM pump provides efficient fuel transfer, reducing fill times significantly, which is especially useful for commercial operations or busy work sites.

Designed for durability, the aluminum construction keeps weight manageable while maintaining strength. Its compact size and integrated design optimize space in your truck bed, and the corrosion-resistant finish ensures longevity even in rugged conditions.

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

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Rds Aluminum 74551 20 Gal Rectangular Auxiliary Fuel Tank – Compact and Durable

This 20-gallon aluminum auxiliary tank from RDS MFG INC is designed for those needing a smaller, more adaptable fuel storage solution. Its rectangular shape allows it to fit in tighter spaces within your truck bed or behind the cab, making it ideal for lighter-duty applications or secondary fueling needs.

The tank has been 100% pressure tested and submerged to check for leaks, ensuring reliability. Fully welded seams and heavy-duty aluminum brackets contribute to its durability, while the US origin assures quality manufacturing standards.

Its relatively compact size makes it lightweight and easier to install, especially in trucks with limited space. Perfect for supplemental fuel needs, it can be siphoned from the top with an electric pump for gasoline or other fuels, providing flexibility.

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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 Rectangular Auxiliary Fuel Tank – 69 Gallon Capacity

Offering a larger capacity at 69 gallons, this auxiliary tank from RDS MFG INC is a versatile option for those who need extended range without sacrificing durability. Its rectangular design allows for easy integration into various truck bed layouts, with dimensions of 57.0 inches long, 18 inches wide, and 16 inches high.

The tank is suitable for gasoline, which can be siphoned from the top using an electric pump, making refueling quick and clean. Its robust construction ensures longevity, and the option to choose from a range of capacities makes it adaptable for different needs.

Installation is straightforward, provided you measure your space carefully. Its lightweight design (43.545 kilograms) allows for easier handling during setup, making it suitable for both professional and personal use.

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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
• Package Dimensions: 57.0 " L x 18.0 " W x 16.0 " H
• Package Weight: 43.545 kilograms

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Dee Zee DZ91752X Narrow Auxiliary Diesel Fuel Transfer Tank – 39 Gallon

The Dee Zee DZ91752X is tailored for diesel users who need a narrow, efficient tank that fits in tight spaces. Its 39-gallon capacity is suitable for smaller trucks or as a secondary tank. The tank is certified to meet federal DOT requirements, ensuring safety and compliance.

Its non-rusting, 0.125-inch Brite-Tread aluminum finish provides corrosion resistance, while the vented cap aids in safe fueling. The hydrostatically tested pressure capacity of 29 psi guarantees durability under operational stresses. Its compatibility with OEM fuel lines makes installation straightforward for diesel applications.

The narrow profile maximizes space efficiency, and the durable aluminum construction lends itself well to off-road or rugged environments, making it an excellent choice for diesel-powered trucks that need an extra fuel reserve.

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• Certified Auxiliary Fuel Transfer Tank Meets Federal DOT Requirements. Compatible with Center Mounted Transfer Pumps
• Connect to OEM Fuel Line to Transfer Diesel Fuel
• Non-rusting; 0.125 Brite-Tread aluminum with vented cap
• Hydrostatically pressure tested to 29 psi
• Full weld stability baffles and drain plug

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51 Gallon Aluminum Fuel Transfer Tank Toolbox Combo with 12 GPM Pump – Versatile and Rugged

This 51-gallon combo from Vigorighter combines a full-sized fuel transfer tank with a built-in toolbox, crafted from corrosion-resistant aluminum. Its overall dimensions, approximately 58.1 inches long, 19 inches wide, and 20 inches high, make it a space-efficient choice that maximizes truck bed utility while providing substantial fuel capacity and secure storage.

The included 12 GPM pump with a 13-foot hose and auto-shutoff nozzle allows for spill-free, efficient refueling of various equipment, making it versatile for trucks, tractors, boats, and generators. The rugged aluminum build ensures longevity and resistance to harsh conditions, ideal for demanding work environments.

Installation is straightforward, and the integrated toolbox keeps tools organized and accessible. The unit’s design facilitates quick refueling and tool storage in one compact package, saving time and space.

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• Heavy-Duty All-in-One Combo: This space-saving unit combines a full-size 51-gallon auxiliary fuel tank with a built-in toolbox, all crafted from rugged corrosion-resistant aluminum for maximum durability. Its compact footprint (overall 58.1"L x 19"W x 20"H, toolbox: 31"L x 19"W x 8.8"H) maximizes truck bed space, letting you haul fuel, tools, and cargo in one go.
• Rugged Corrosion-Resistant Build: Built to last, the entire unit features heavy-duty, corrosion-resistant aluminum construction. This rugged build is designed to endure tough conditions, ensuring reliable performance and long-term service on any worksite or road.
• Plug-and-Play Pump Kit: The included high-flow 12V DC fuel transfer pump (12 GPM) with a 13 ft hose and auto-shutoff nozzle delivers spill-free refueling directly in the field. Simply connect to a power source—installation is a breeze. Get true plug-and-play convenience.
• Universal Power & Fuel Use: Designed for ultimate versatility, the pump easily connects to any 12V battery (vehicle or standalone) and safely handles gasoline, diesel, kerosene, and mineral oil. It's the perfect refueling partner for trucks, tractors, boats, mowers, generators, and more.
• Overheat-Protected Motor: Engineered for dependable use, the pump features an intermittent-duty motor with a built-in thermal protector to prevent overheating. For maximum pump life, we recommend a 30-minute cooldown after extended pumping sessions.

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RDS MFG INC Fuel Tank – 60-Gallon, Reliable and Versatile

This 60-gallon fuel tank from RDS MFG INC offers a straightforward solution for auxiliary fueling needs. Its sturdy construction and compatibility with gasoline make it suitable for a variety of trucks and applications. The tank is designed to fit some short beds, so measuring your space beforehand is essential.

The tank’s durable build and high-quality manufacturing ensure long-term performance. It is primarily intended for gasoline, with siphoning from the top using an electric pump—making it ideal for temporary or secondary fuel storage where a large capacity is needed.

Installation is made easier with the right support, though the size demands careful planning for placement. Its reliability and simple design make it a practical choice for many truck owners.

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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
• Fits some short beds; please measure before ordering
• Cannot be used to transfer gasoline to another vehicle

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RDS MFG INC Auxiliary Fuel Tank 37Gal – Compact and Efficient

This 37-gallon auxiliary tank from RDS MFG INC offers a compact solution for secondary fuel storage. Its smaller size makes it suitable for trucks with limited space or for those who want a lightweight, easy-to-install option. The tank is designed for gasoline, which can be siphoned from the top with an electric pump for quick refueling.

Its straightforward design and quality build ensure longevity and reliable performance. The tank’s dimensions make it easy to fit behind seats or in tight compartments, making it versatile for various pickup configurations.

This tank is perfect for those who need a moderate capacity without the bulk of larger models, providing flexibility for both short trips and regular use.

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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
• Product Type – MOTOR ENGINE FUEL TANK
• Item Package Quantity – 1

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RDS Fuel Transfer/Auxiliary Tank/Toolbox Combo with 15 Gpm Pump – Large Capacity and Versatile

This 90-gallon combo from RDS MFG INC is designed for those who need maximum fuel capacity combined with convenient tool storage. The 15 GPM pump allows rapid fuel transfer, making it ideal for large-scale operations, long-haul trips, or heavy-duty work that demands quick refueling.

The product’s size, measuring approximately 59.69 centimeters in length, 81.28 centimeters in width, and 144.78 centimeters in height, offers substantial capacity without sacrificing durability. The integrated toolbox provides secure space for tools, spare parts, or safety gear.

Constructed in the United States with quality materials, this tank is built for rugged use. Its dual functionality saves space and simplifies logistics by combining fuel storage with essential tool organization.

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• Product Type:Auto Accessory
• Item Package Dimension:59.69 cm L X 81.28 cm W X 144.78 cm H
• Country Of Origin: United States
• Item Package Weight:86.636 kg

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RDS Fuel Transfer/Auxiliary Tank/Toolbox Combo with 8 Gpm Pump – 91-Gallon Capacity

This 91-gallon auxiliary tank offers a significant fuel reserve for extended trips or heavy-duty applications. Its combo design includes a toolbox, providing added convenience for tools and accessories. The 8 GPM pump ensures efficient fuel transfer, suitable for various fueling tasks.

The tank’s dimensions and construction from RDS MFG INC ensure robust performance, with the US origin confirming quality standards. Its capacity makes it ideal for off-road adventures, long-haul trucking, or construction work where frequent refueling is necessary.

Easy to install and maintain, this tank is designed to withstand tough conditions, ensuring dependable service over many years.

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• Product Type:Auto Accessory
• Item Package Dimension:58.42 cm L X 76.2 cm W X 139.7 cm H
• Country Of Origin: United States
• Item Package Weight:79.832 kg

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Buyer’s Guide: What to Consider

When selecting an auxiliary fuel tank for your pickup truck, it’s crucial to consider several practical factors that influence performance, safety, and compatibility. The right choice depends on your specific use case, whether for long-distance travel, worksite fueling, or recreational off-roading.

• Capacity: Choose a tank that meets your fuel needs without being overly bulky or weighty, balancing capacity with installation flexibility.
• Material and Durability: Opt for corrosion-resistant materials like aluminum or steel, especially if you operate in harsh environments or need longevity.
• Pump Compatibility and Transfer Rate: If quick refueling is essential, look for models with high GPM pumps and easy installation features.
• Size and Fit: Measure your truck bed space carefully to ensure the tank fits comfortably without obstructing other gear or tools.
• Additional Features: Consider integrated toolboxes, spill-proof designs, venting systems, and ease of siphoning for added convenience and safety.
• Fuel Type Compatibility: Make sure the tank is compatible with your fuel type—gasoline, diesel, or other fuels—especially if you need multi-fuel capabilities.
• Certification and Safety: Ensure the tank meets federal safety standards like DOT certification and pressure testing for peace of mind.

Conclusion

Choosing the best auxiliary fuel tank involves balancing capacity, durability, size, and additional features to suit your needs. The options reviewed here provide a range of solutions, from compact secondary tanks to large combo units with tool storage and high-flow pumps.

Ultimately, your ideal tank should offer reliable performance, easy installation, and safety compliance. Carefully assess your truck’s space and your fuel requirements to make an informed decision that enhances your vehicle’s capabilities and your overall experience.