If you spend long hours on the road or rely on your truck for work, running out of fuel is more than an inconvenience—it costs time and money. Auxiliary fuel tanks offer a practical solution, letting you carry extra diesel or gasoline safely and conveniently.
This guide reviews the best auxiliary fuel tanks for pickup trucks, from heavy-duty aluminum tanks to installation kits and workshop tools. Whether you need to extend your driving range or tune a carburetor, you will find the right option here.
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RDS MFG INC 71083 Rectangular Auxiliary/Transfer Fuel Tank – 45 Gallon Capa…
Best forRust-free aluminum durability
- Fully welded seams
- Aluminum no rusting
ConsiderRequires electric pump
11025 Diesel Installation Kit Auxiliary Fuel Tank Install Kit for Diesel
Best forComplete truck installation kits
- Includes all necessary parts
- Gravity-fed stable flow
ConsiderNot for gasoline
RDS MFG INC Rectangular Auxiliary Fuel Tank – 69 Gallon
Best forLong-distance hauling needs
- Huge 69-gallon capacity
- Aluminum rust-free
ConsiderLarge footprint
RDS MFG INC Auxiliary Fuel Tank 37Gal – 71804
Best forCompact bed space saving
- Compact size
- Aluminum no rust
ConsiderSmaller capacity
TAURISH Auxiliary Fuel Tank Workshop Tool Balancing Carbs Carburettor
Best forMotorcycle carburetor tuning
- Essential for carb balancing
- DIY friendly
ConsiderNot for vehicle use
RDS MFG INC Fuel Tank – 60-Gallon
Best forShort bed truck owners
- Fits short beds
- 60-gallon capacity
ConsiderMeasure before buying
MOTO4U Auxiliary Gas Fuel Tank Universal Motorcycle Gas Tank Repair Tool Ki…
Best forVersatile small engine work
- Universal fit
- Control flow valve
ConsiderSmall 1L capacity
Porotmotor Motorcycle Auxiliary Fuel Tank (500ml with Vent) Gas Tank for Sm…
Best forPrecise small engine tuning
- Compact and portable
- Vent for smooth flow
ConsiderVery small capacity
RDS MFG INC – 72548 Fuel Transfer Tank/Auxiliary Fuel Tank/Toolbox Combo – …
Best forTool storage and fuel
- Combines tank and toolbox
- Made in USA
ConsiderHeavier unit
Auxiliary Fuel Tank Install Kit 11025 Diesel Installation Kit
Best forOEM standard installations
- OEM quality certified
- Wide truck compatibility
ConsiderCheck part number
RDS 45 Gallon Rectangular Auxiliary Tank – Durable Aluminum
Brand: RDS MFG INC
A dependable aluminum tank that adds significant range without rust worries.
The RDS 45-gallon rectangular tank is a solid choice for truck owners who want extra fuel capacity without compromising bed space. Its fully welded seams ensure long-lasting durability, and the aluminum construction means you never have to worry about rust. This tank is designed to fit a variety of truck beds, so you can find the right dimensions for your vehicle.
You can use this tank for gasoline as long as you siphon from the top with an electric fuel pump, which adds flexibility. The rectangular shape makes it easy to secure in your truck bed, and the aluminum material keeps it lightweight compared to steel. If you need a reliable, no-fuss auxiliary tank for long hauls, this model delivers.
- Fully welded seams
- Aluminum no rusting
- 45-gallon capacity
- Requires electric pump
- Check bed dimensions
JURPLIX Diesel Installation Kit – Complete Gravity-Fed Setup
Brand: JURPLIX
A comprehensive installation kit that makes adding an auxiliary tank straightforward.
If you already have an auxiliary tank, the JURPLIX installation kit is the missing piece. It includes everything you need: fuel hose, shut-off valve, roll-over valve, aluminum tee, PTFE tape, rubber hose sleeves, and hose clamps. This kit is compatible with popular trucks like Dodge Ram 2500/3500 (1999-2012), Chevy Silverado 2500/3500 HD (2011-2022), and Ford F-250/F-350 Super Duty, so it covers a wide range of vehicles.
The gravity-fed design ensures a steady fuel flow from the auxiliary tank to your factory tank, keeping the fuel level consistent. The high-quality aluminum and durable components mean you can install it once and forget about it. This kit simplifies the installation process, saving you time and effort.
- Includes all necessary parts
- Gravity-fed stable flow
- Wide truck compatibility
- Not for gasoline
- Check fitment first
RDS 69 Gallon Rectangular Tank – Maximum Range
Brand: RDS MFG INC
A massive tank that dramatically extends your driving range for serious road warriors.
For truck owners who need the ultimate range, the RDS 69-gallon rectangular tank is a top contender. With its large capacity, you can travel hundreds of miles without stopping for fuel. The aluminum construction ensures it won’t rust, and the fully welded seams add to its durability, even in tough conditions.
Like other RDS tanks, this model allows gasoline use if you siphon from the top with an electric fuel pump. The package dimensions are 57 inches long, 18 inches wide, and 16 inches high, so you should measure your truck bed to ensure a proper fit. This tank is ideal for long-haul drivers or those who frequently travel through remote areas.
- Huge 69-gallon capacity
- Aluminum rust-free
- Welded seams
- Large footprint
- Heavy when full
RDS 37 Gallon Auxiliary Tank – Compact and Practical
Brand: RDS MFG INC
A versatile, space-efficient tank that adds useful fuel capacity without bulk.
The RDS 37-gallon auxiliary tank is a practical choice for those who want extra fuel without taking up too much bed space. Its smaller footprint makes it easier to fit in short-bed trucks, and the aluminum build keeps it lightweight and rust-free. This tank is part of RDS’s full assortment, so you can trust its quality.
Gasoline use is allowed if you siphon from the top with an electric fuel pump, giving you flexibility. The product type is a motor engine fuel tank, and it comes as a single unit. If you need a moderate capacity boost for daily driving or light hauling, this tank offers a good balance.
- Compact size
- Aluminum no rust
- Easy to install
- Smaller capacity
- Requires pump for gas
TAURISH Auxiliary Fuel Tank – Carburetor Balancing Tool
Brand: TAURISH
A handy workshop tool for precise carburetor tuning and maintenance.
This TAURISH auxiliary fuel tank is not for trucks—it’s a workshop tool designed for motorcycle maintenance. It helps you balance carburetors by providing a steady fuel supply directly to the engine. This is a must-have for DIY servicing and tuning, especially if you work on multiple bikes.
The tank is easy to use: you connect it to the carburetor, and it delivers fuel without relying on the bike’s main tank. This makes it perfect for synchronizing carbs and diagnosing fuel-related issues. If you’re a home mechanic, this tool simplifies tasks that would otherwise be messy and time-consuming.
- Essential for carb balancing
- DIY friendly
- Steady fuel supply
- Not for vehicle use
- Small capacity
RDS 60 Gallon Fuel Tank – Short Bed Friendly
Brand: RDS MFG INC
A high-capacity tank that fits short beds, with a few usage limitations.
The RDS 60-gallon fuel tank is designed with short-bed trucks in mind, but it’s crucial to measure before ordering. Its aluminum construction ensures no rust, and the fully welded seams provide long-term reliability. This tank offers a substantial capacity boost for those who need extra range.
One important note: this tank cannot be used to transfer gasoline to another vehicle, so it’s strictly for your own truck. Gasoline use is allowed if you siphon from the top with an electric fuel pump. If you have a short bed and need a large tank, this model is worth considering.
- Fits short beds
- 60-gallon capacity
- Rust-free aluminum
- Measure before buying
- No gas transfer
MOTO4U Auxiliary Fuel Tank – Universal Motorcycle Tool
Brand: MOTO4U
A practical, versatile auxiliary tank for motorcycle and small engine servicing.
The MOTO4U auxiliary fuel tank is a compact 1-liter tool designed for motorcycle maintenance. It comes with a fuel hose, cut-off valve, and a lid with an air outlet, making it easy to control fuel flow. The hose fits a 1/4-inch interface, so it connects securely to most motorcycles.
This tank works with both fuel-injected models that have external fuel pumps and standard carburetor-equipped bikes. It’s also versatile enough for mowers, bikes, and cars. The upgraded cut-off valve lets you open and close the flow precisely, which is great for carburetor synchronization and tuning.
- Universal fit
- Control flow valve
- Air outlet for smooth flow
- Small 1L capacity
- Not for large vehicles
Porotmotor 500ml Auxiliary Tank – Compact Carb Tuning
Brand: porotmotor
A reliable, compact tank for carburetor tuning and small engine maintenance.
The Porotmotor auxiliary fuel tank is a 500ml tool specifically for small engine work and carburetor tuning. Its compact size makes it easy to handle, and the vent ensures smooth fuel delivery. You can bypass the bike’s main tank and deliver clean fuel directly to the carburetor, which is essential for precise adjustments.
The design allows you to hang it on a handlebar or bench vice, giving you easy access during engine work. It’s built from high-quality materials, so it’s durable enough for regular garage use. If you’re a motorcycle enthusiast or professional mechanic, this tool is a valuable addition.
- Compact and portable
- Vent for smooth flow
- Durable construction
- Very small capacity
- Limited to workshop use
RDS 60 Gallon Tank and Toolbox Combo – Dual Purpose
Brand: RDS MFG INC
A smart dual-purpose unit that maximizes utility in your truck bed.
The RDS 60-gallon fuel transfer tank and toolbox combo is a clever solution for truck owners who need both extra fuel and storage. It combines a 60-gallon tank with a toolbox, saving bed space and adding functionality. The product is made in the USA and comes with a package weight of about 54 kilograms.
This combo is ideal for work trucks where you need to carry tools and have extra fuel for long jobs. The aluminum construction ensures durability and rust resistance. While it’s a bit heavier due to the toolbox, the convenience of having both in one unit is a major plus.
- Combines tank and toolbox
- Made in USA
- Durable aluminum
- Heavier unit
- Limited to 60 gallons
VASTAUTO Installation Kit – Gravity Fuel System
Brand: VASTAUTO
A high-quality installation kit that meets OEM standards for diesel trucks.
The VASTAUTO auxiliary fuel tank installation kit is designed to provide a steady supply of gravity-fed fuel to control the fuel level in your tank. It includes fittings for 3/8-inch female drain fittings, making it compatible with a wide range of trucks. This kit works with Ford F-250/F-350/F-450 Super Duty (1999-2022), Dodge Ram 2500/3500 (1999-2010), and Chevy Silverado 2500 HD/3500 HD (2011-2022).
The kit replaces part number 11025, so you can easily match it to your existing setup. It’s made from high-quality materials and is tested to meet OEM standards. If you’re installing an auxiliary tank, this kit ensures a reliable and leak-free connection.
- OEM quality certified
- Wide truck compatibility
- Gravity-fed design
- Check part number
- Not for gasoline
Buyer’s Guide: What to Consider
Choosing the right auxiliary fuel tank depends on your vehicle, fuel needs, and intended use. This guide covers key factors to help you make an informed decision.
- Capacity: Consider how much extra fuel you need. Larger tanks like 69 gallons extend range significantly but take up more bed space. Smaller tanks like 37 gallons are easier to fit and lighter.
- Material: Aluminum tanks are rust-free and lighter than steel, making them ideal for long-term use. RDS tanks are fully welded for durability, which is crucial for off-road or heavy-duty applications.
- Compatibility: Ensure the tank or installation kit fits your truck model and year. Kits like JURPLIX and VASTAUTO specify compatible vehicles, so check your truck's make and model before purchasing.
- Fuel Type: Some tanks allow gasoline use, but only if you siphon from the top with an electric pump. Others are diesel-only. Always verify the fuel type to avoid safety issues.
- Installation: If you're not handy, consider a complete installation kit that includes all necessary parts. Gravity-fed systems are simpler and require no pumps, but ensure the kit matches your tank's fittings.
Conclusion
Auxiliary fuel tanks are a game-changer for truck owners who need extra range or workshop tools for maintenance. Whether you opt for a large RDS tank for long hauls or a compact motorcycle tool for tuning, there’s a solution for every need.
For most truck owners, the RDS 45-gallon or 69-gallon tanks offer excellent durability and capacity. If you’re installing a tank, the JURPLIX or VASTAUTO kits simplify the process. For motorcycle enthusiasts, the TAURISH or MOTO4U tools are indispensable. Choose based on your specific requirements, and you’ll enjoy the benefits of extra fuel and convenience.
Erica Steven is the founder and lead writer of WorstBrands, a site dedicated to providing honest and trustworthy reviews about outdoor gear and fashion products.
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