Best Auxiliary Diesel Fuel Tank: Practical Features for Easier Everyday Use

A strong auxiliary diesel fuel tank delivers dependable capacity, a suitable transfer method, and a secure fit for truck owners, contractors, and drivers who need more fuel on hand. This roundup covers 10 options ranging from compact 42- and 43-gallon tanks to 116-gallon portable polyethylene models. Some are dedicated aluminum or steel tanks, while others combine a fuel tank with a toolbox and pump.

The most important choice is matching the tank’s dimensions and capacity to your truck bed and daily workload. You should also distinguish between a portable tank with an integrated 12V pump and an auxiliary tank designed for gravity feeding through an installation kit.

Material, baffles, locking features, hose length, and pump flow all affect everyday handling and refueling convenience.

The best auxiliary diesel fuel tank depends on how you refuel and how much truck-bed space you can dedicate. VEVOR’s 58- and 116-gallon polyethylene tanks include 12V pumps rated at 10.6 GPM, hoses, and fuel gauges, making them practical portable transfer options. Aluminum choices from RDS, Dee Zee, BLACKHORSE-RACING, and Vigorighter emphasize corrosion resistance, with some adding tool storage.

RDS tanks support auxiliary fueling, while compatible 11025 installation kits provide gravity-feed components for specified diesel trucks.

Auxiliary Diesel Fuel Tanks Compared

Image	Product	Buy
Best Pick 1	VEVOR Portable Diesel Tank, 58 Gallon Capacity & 10 GPM Flow Rate, Portable Fuel Tank with 12V Electric Transfer Pump and 13.1ft Rubber Hose, PE Diesel Transfer Tank for Easy Fuel Transportation Black Best for: Portable diesel transport Brand: VEVOR | Capacity: 58 gallons	View on Amazon
Best Pick 2	RDS MFG INC 71083 Rectangular Auxiliary/Transfer Fuel Tank – 45 Gallon Capacity Best for: Standard auxiliary tank Brand: RDS MFG INC | Capacity: 45 gallons	View on Amazon
Best Pick 3	51 Gallons Combo Aluminum Fuel Transfer Tank, with 10 GPM Fuel Transfer Pump/Gasoline Diesel Transfer Tank & Toolbox/Auxiliary Fuel Tank-Black Best for: Combo tank and toolbox Brand: BLACKHORSE-RACING | Capacity: 51 gallons	View on Amazon
Best Pick 4	Dee Zee DZ92556NSB Transfer Tank Best for: Compact transfer tank Brand: DEE ZEE | Capacity: 128 liters	View on Amazon
Best Pick 5	VEVOR Portable Diesel Tank, 116 Gallon, Black Best for: Large portable diesel Brand: VEVOR | Capacity: 116 gallons	View on Amazon

How We Compared These Products

We compared dimensions, capacity, materials, compatibility, included components, and care requirements across many Amazon listings. These details matter because the product must fit the available space, intended use, setup requirements, and maintenance routine. After examining the wider field, we selected 10 products from VEVOR, RDS MFG INC, BLACKHORSE-RACING, DEE ZEE, JURPLIX, RALZAOTO, and Vigorighter.

The shortlist includes products such as VEVOR Portable Diesel Tank, RDS MFG INC 71083 Rectangular Auxiliary/Transfer Fuel Tank, and BLACKHORSE-RACING 51 Gallons Combo Aluminum Fuel Transfer Tank. Every recommendation is tied to information stated for that specific product; unclear or missing features were treated as unknown rather than filled with assumptions.

Detailed Reviews: Best Auxiliary Diesel Fuel Tank

1. VEVOR Portable Diesel Tank, 58 Gallon Capacity & 10 GPM Flow Rate, Portable Fuel Tank with 12V Electric Transfer Pump and 13.1ft Rubber Hose, PE Diesel Transfer Tank for Easy Fuel Transportation Black

Best for: Heavy-duty portable diesel transport.

This VEVOR 58-gallon portable diesel tank features a robust polyethylene construction resistant to UV radiation and changing weather. Its lockable upper lid with a copper lock ensures operational security and guards against theft, providing peace of mind during fuel transport.

Constructed from durable LLDPE polyethylene with a thickness of 6mm, this 58-gallon tank is built for longevity. The included 12V electric transfer pump offers a rapid 10.6 GPM flow rate, significantly reducing refueling time. Monitor fuel levels easily with the 8-level gauge scales integrated into the design.

Product Details

Pros

• Durable polyethylene construction resists UV and weather
• Lockable lid for enhanced security
• High flow rate of 10.6 GPM for quick transfers
• Integrated fuel gauge for easy monitoring

Cons

• Hose is made of rubber and inlaid with steel wire, which may affect flexibility in extreme cold.

Ideal for those needing a secure and efficient portable diesel solution for transport, this tank is best suited for users who prioritize durability and quick refueling capabilities.

2. RDS MFG INC 71083 Rectangular Auxiliary/Transfer Fuel Tank – 45 Gallon Capacity

Best for: Durable aluminum auxiliary tank.

The RDS MFG INC 71083 is a 45-gallon rectangular auxiliary fuel tank constructed from aluminum, ensuring it will not rust. Its fully welded seams provide enhanced durability for reliable fuel storage and transfer needs.

This 45-gallon aluminum tank is designed for auxiliary fueling, allowing diesel fuel to gravity feed from the bottom when an optional Diesel Install Kit is used. Gasoline auxiliary fueling is also supported via an electric fuel pump siphoning from the top. The aluminum construction prevents rusting, ensuring a long service life.

Product Details

Pros

• Rust-proof aluminum construction
• Fully welded seams for durability
• Supports diesel gravity feed and gasoline siphoning
• 45-gallon capacity for substantial fuel storage

Cons

• May require an optional Diesel Install Kit for optimal diesel transfer.

This RDS tank is a solid choice for truck owners needing a durable, rust-free auxiliary fuel solution, particularly for those who prefer gravity feeding diesel or siphoning gasoline.

3. 51 Gallons Combo Aluminum Fuel Transfer Tank, with 10 GPM Fuel Transfer Pump/Gasoline Diesel Transfer Tank & Toolbox/Auxiliary Fuel Tank-Black

Best for: Combo fuel tank with toolbox.

This 51-gallon combo fuel transfer tank from BLACKHORSE-RACING features a durable black aluminum construction that is rust and corrosion-resistant. It includes a built-in toolbox with a key, offering immediate usability and secure storage for tools.

Crafted from robust black aluminum, this 51-gallon tank is built to withstand changing weather conditions and resist UV radiation. It comes equipped with a 10 GPM 12V DC fuel pump, a 13.1ft hose, and an automatic refueling nozzle for efficient and fast refueling. The tank also features a double lock and keys for added security.

Product Details

Pros

• Durable, rust-resistant aluminum construction
• Integrated toolbox with locking mechanism
• High-efficiency 10 GPM fuel pump
• Includes 13.1ft hose and auto nozzle

Cons

• Package does not contain a fuel filter.

This all-in-one aluminum tank and toolbox combo is perfect for users who need to transport fuel and store tools securely, offering convenience and durability for various applications.

4. Dee Zee DZ92556NSB Transfer Tank

Best for: Heavy-duty steel truck bed tank.

The Dee Zee DZ92556NSB is a 42-gallon transfer tank constructed from heavy-duty 14-gauge steel with a black NRT rust inhibitor powder coat finish. Its radius curve design eliminates weld pressure points, enhancing structural integrity.

This 42-gallon steel tank features a radius curve design and 5 stability baffles to minimize sloshing and enhance stability. The black NRT powder coat finish provides superior protection against rust. It includes mounting tabs for secure attachment to a truck bed and a drain plug for easy maintenance.

Product Details

Pros

• Heavy-duty 14-gauge steel construction
• Black NRT rust inhibitor powder coat finish
• Radius curve design eliminates weld pressure points
• Includes 5 stability baffles for secure transport

Cons

• Made of steel, which can be heavier than aluminum tanks.

This robust 42-gallon steel tank is ideal for transporting non-flammable liquids securely in truck beds, offering excellent durability and rust protection for demanding use.

5. VEVOR Portable Diesel Tank, 116 Gallon, Black

Best for: Large capacity portable diesel tank.

The VEVOR 116-gallon portable diesel tank boasts a robust polyethylene construction, designed to withstand changing weather conditions and resist UV radiation. Its lockable upper lid, secured by a copper lock, ensures the safety and security of its contents.

Constructed from high-quality polyethylene (PE) with a thickness of 6mm (up to 12mm at the thickest part), this 116-gallon tank offers substantial capacity. The integrated 12V DC transfer pump delivers fuel at a rate of 10.6 GPM, ensuring efficient refueling. The tank's dimensions are 41 x 28.4 x 29 inches.

Product Details

Pros

• Large 116-gallon capacity
• Durable polyethylene construction
• UV and weather resistant
• Lockable lid for security

Cons

• The 13.1 ft hose length may be limiting for some applications.

This VEVOR 116-gallon tank is an excellent choice for users requiring a large-volume, durable, and secure portable diesel storage solution for extensive refueling needs.

6. RDS MFG INC Rectangular Auxiliary Fuel Tank – 69 Gallon

Best for: High-capacity aluminum auxiliary tank.

The RDS MFG INC 70326 is a 69-gallon rectangular auxiliary fuel tank made from aluminum, preventing rust and ensuring long-term durability. It is designed to fit multiple vehicle types, offering versatile auxiliary fueling capabilities.

This 69-gallon aluminum tank is suitable for auxiliary fueling, allowing diesel fuel to gravity feed from the bottom. Gasoline can be transferred using an electric fuel pump siphoning from the top. The tank's dimensions are 57 x 18 x 16 inches, providing a substantial capacity for extended use.

Product Details

Pros

• Generous 69-gallon capacity
• Rust-proof aluminum construction
• Supports diesel gravity feed
• Compatible with multiple vehicle types

Cons

• Requires an optional Diesel Install Kit for optimal diesel transfer.

This high-capacity RDS aluminum tank is ideal for users needing a durable, rust-free auxiliary fuel solution for diesel or gasoline, offering ample storage for extended operations.

7. Dee Zee DZ92740XB (43 gallon) Auxiliary Diesel Fuel Transfer Tank – Black Aluminum

Best for: Combo tank with storage.

The Dee Zee DZ92740XB is a 43-gallon auxiliary diesel fuel transfer tank constructed from Brite-Tread aluminum with a protective black powder coat finish. It uniquely combines liquid transfer capabilities with convenient bolted-on storage.

This 43-gallon tank is made from durable Brite-Tread aluminum and features a black powder coat finish for corrosion resistance. It includes 3 stability baffles, a lockable cap, and a 0.375-inch drainage plug. The integrated utility chest provides convenient storage for tools and equipment.

Product Details

Pros

• Durable Brite-Tread aluminum construction
• Protective black powder coat finish
• Integrated storage chest
• Includes 3 stability baffles

Cons

• The 43-gallon capacity might be insufficient for very large fuel needs.

This Dee Zee combo tank is perfect for truck owners who need both fuel transfer and tool storage, offering a durable and convenient solution for job sites or remote locations.

8. 11025 Diesel Installation Kit Auxiliary Fuel Tank Install Kit for Diesel

Best for: Diesel auxiliary tank installation kit.

The JURPLIX 11025 Diesel Installation Kit is designed for auxiliary fuel tanks, providing essential components for a complete setup. It includes a fuel hose, shut-off valve, roll-over valve, and aluminum tee, among other hardware.

This comprehensive kit is compatible with various truck models including Dodge Ram, Chevy Silverado, Ford F-250/F-350 Super Duty, and GMC Sierra. Made from aluminum and rubber components, it ensures corrosion resistance and a long service life. The package contains all necessary hardware for installation.

Product Details

Pros

• Comprehensive installation hardware included
• Compatible with multiple popular truck models
• Durable aluminum and rubber construction
• Includes shut-off and roll-over valves

Cons

• Does not include the fuel tank itself.

This JURPLIX installation kit is essential for users installing an auxiliary diesel fuel tank on compatible trucks, providing all the necessary parts for a secure and functional setup.

9. Auxiliary Fuel Tank Install Kit Diesel Installation Kit 11025

Best for: Universal diesel install kit.

The RALZAOTO Auxiliary Fuel Tank Install Kit, model 11025, is crafted from high-quality aluminum and rubber for corrosion resistance and longevity. It facilitates a stable gravity fuel supply and is designed for easy installation.

This diesel installation kit is compatible with 1999-2024 Ford, 2011-2022 Chevy/GMC, and 1999-2012 Dodge trucks equipped with diesel engines. It allows for control of the fuel level from the OE tank and ensures a reliable gravity fuel supply. The kit uses OE part number 11025.

Product Details

Pros

• Durable aluminum and rubber construction
• Easy installation process
• Provides stable gravity fuel supply
• Wide compatibility with diesel trucks

Cons

• Warranty description states 'NO'.

This RALZAOTO kit is a suitable choice for diesel truck owners needing a reliable installation solution for their auxiliary fuel tank, ensuring proper fuel flow and control.

10. 51 Gallon Aluminum Fuel Transfer Tank Toolbox Combo with 12 GPM 12V DC Pump, Truck Bed Gas Tank for Gasoline Diesel Kerosene, 13Ft Hose, Auto Nozzle, Black

Best for: All-in-one fuel tank and toolbox.

The Vigorighter 51-gallon fuel transfer tank is a heavy-duty, all-in-one unit combining a fuel tank with a built-in toolbox, crafted from rugged, corrosion-resistant aluminum. This space-saving design maximizes truck bed utility.

This 51-gallon tank features a robust aluminum construction and includes an integrated toolbox (31"L x 19"W x 8.8"H) for tool storage. It is equipped with a 12 GPM 12V DC pump, auto nozzle, and a 13ft hose for efficient fuel transfer of gasoline, diesel, or kerosene. Always open the pressure relief valve when pumping.

Product Details

Pros

• Integrated toolbox for tool storage
• Corrosion-resistant aluminum build
• High-capacity 51 gallons
• Includes 12 GPM pump and auto nozzle

Cons

• Requires opening the pressure relief valve to prevent vacuum collapse during pumping.

This Vigorighter combo tank is perfect for truck owners who need to carry both fuel and tools, offering a durable, efficient, and space-saving solution for various hauling needs.

What Buyers Often Overlook

Capacity and truck-bed fit

Choose capacity by balancing required fuel volume against the tank’s physical footprint and weight. The listed options span 42 gallons for the Dee Zee DZ92556NSB, 43 gallons for the Dee Zee DZ92740XB, 45 gallons for the RDS 71083, 51 gallons for the BLACKHORSE-RACING and Vigorighter combos, 58 gallons for VEVOR, 69 gallons for the RDS 70326, and 116 gallons for the larger VEVOR model. Dimensions vary substantially: the 69-gallon RDS measures 57 x 18 x 16 inches, while the Vigorighter combo lists a 50 x 19 x 21-inch overall size and a 31 x 19 x 8.8-inch toolbox.

Confirm bed width, available length, mounting points, and clearance before selecting a larger tank. A higher capacity is useful for extended work, but it also occupies more space and adds more fuel weight when full.

The Key Product Trade-Off

Material, transfer method, and installation compatibility

Material and transfer design determine whether a tank suits portable refueling or vehicle-integrated use. VEVOR’s polyethylene tanks use 6 mm material, with thicker sections reaching 12 mm, and include lockable lids; their 12V pumps deliver 10.6 GPM through a 13.1-foot hose. Aluminum models from RDS, Dee Zee, BLACKHORSE-RACING, and Vigorighter offer corrosion-resistant construction, while the Dee Zee steel DZ92556NSB adds five stability baffles, mounting tabs, and a drain plug.

RDS describes gravity feeding from the tank bottom and offers auxiliary fueling, but an optional diesel installation kit may be needed. The JURPLIX and RALZAOTO 11025 kits list hose, valves, fittings, clamps, and truck compatibility, but fitment differs: listed applications include specific Ford, Chevy/GMC, and Dodge diesel trucks.

Verify the vehicle and connection requirements before ordering.

Best Auxiliary Diesel Fuel Tank: Buyer's Guide

Fit, Dimensions, and Compatibility

Compare the listed dimensions with the intended counter, cabinet, appliance, storage, or installation space. Confirm model compatibility and connection requirements where they are supplied. A useful feature cannot compensate for a product that does not physically fit or work with the buyer’s existing setup.

Capacity, Output, and Operating Format

Match listed capacity, volume, output, and operating mode to the actual household or work routine. Larger figures can support heavier use, while a smaller format may be easier to place and maintain. Treat daily output, immediate storage, and container capacity as separate specifications when the listing distinguishes them.

Materials, Construction, and Care

Use the listed materials and care instructions to judge cleaning effort, storage conditions, and compatibility with the intended use. Dishwasher, freezer, food-contact, or weather-related claims are included only when supplied for that product. Check whether routine care fits the way the product will be used.

Included Components and Setup Needs

Review the included components before planning installation or first use. Hoses, adapters, lids, paddles, bowls, brushes, controls, and manuals vary by listing. Confirm power, water, assembly, or accessory requirements from the supplied product information rather than assuming that separately pictured parts are included.

Which Should You Choose?

Choose a portable VEVOR tank when you need to move diesel and want an included 12V pump, hose, and gauge; the 58-gallon version is easier to manage than the 116-gallon model, while the larger tank prioritizes reserve capacity. Choose an RDS aluminum tank when auxiliary fueling and a rectangular truck-bed format matter, selecting 45 or 69 gallons to match available space. Pick the Dee Zee steel model for baffles, mounting tabs, and a 42-gallon capacity, or the Dee Zee aluminum combo when integrated storage is useful.

The BLACKHORSE-RACING and Vigorighter models suit buyers wanting a 51-gallon tank with a pump and toolbox. For gravity-feed installation, confirm truck fitment before choosing a JURPLIX or RALZAOTO 11025 kit.

Quick Buying Checklist

• Confirm the complete dimensions against the available space.
• Verify model, accessory, connection, and appliance compatibility.
• Match capacity or output to the expected amount of use.
• Compare materials and care instructions with the maintenance routine.
• Check the included components before planning setup or first use.
• Confirm listed power, water, storage, or installation requirements where applicable.

Frequently Asked Questions

What is an auxiliary diesel fuel tank?

An auxiliary diesel fuel tank is an additional tank installed in a vehicle, typically a truck, to increase its fuel capacity. It allows for longer driving ranges between refueling stops and is often used for transporting extra fuel for equipment or extended journeys.

Are auxiliary diesel tanks legal?

Legality varies by region and specific vehicle type. Many jurisdictions permit auxiliary diesel tanks for off-road use or specific commercial applications. It’s crucial to check local regulations and ensure compliance with any emissions or safety standards before installation.

How do I choose the right capacity?

Capacity depends on your needs. Consider how much extra range you require and the available space in your vehicle. Larger tanks offer more fuel but take up more room and add weight.

Smaller tanks are more compact but provide less additional fuel.

What materials are common for these tanks?

Common materials include aluminum and polyethylene (plastic). Aluminum tanks are durable and resistant to corrosion, often featuring a toolbox for added utility.

Do I need an installation kit?

Yes, an installation kit is typically required to properly connect an auxiliary fuel tank to your vehicle’s existing fuel system. These kits usually include necessary hoses, fittings, and sometimes pumps or sending units to ensure safe and functional fuel transfer.

Final Words

Selecting the best auxiliary diesel fuel tank depends on your specific needs for capacity, portability, and integration. For maximum convenience and range, consider larger capacity tanks. If space is limited or portability is key, smaller or combo units offer flexibility.

Always ensure proper installation and compliance with local regulations.