Combining a fuel tank with a toolbox is a smart way to save bed space on a pickup truck, but not all combos are created equal. We researched manufacturer specifications, industry safety standards, and aggregated owner feedback to compare the top models. Our evaluation focuses on fuel capacity, tank material corrosion resistance, pump reliability, toolbox security, and ease of installation. Below are our findings to help you choose the right setup for your needs.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Transfer Flow 40 Gallon Combo Toolbox Fuel Tank Best Overall 40 gallon, aluminum tank, 12V pump, locking toolbox |
9.0 | 🛒 Check Price |
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RDS Manufacturing 30 Gallon Aluminum Fuel Tank Toolbox Combo Best Value 30 gallon, aluminum, 12V pump, locking lid |
8.7 | 🛒 Check Price |
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ATI 50 Gallon Fuel Tank Toolbox Combo Maximum Capacity 50 gallon, steel, 12V pump, locking toolbox |
8.4 | 🛒 Check Price |
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Northern Tool 26 Gallon Steel Fuel Tank Toolbox Combo Budget Pick 26 gallon, steel, manual pump, locking lid |
7.8 | 🛒 Check Price |
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Better Built 38 Gallon Aluminum Fuel Tank Toolbox Combo Premium Build 38 gallon, aluminum, 12V pump, locking T-handle |
8.2 | 🛒 Check Price |
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Titan Fuel Tanks 30 Gallon Combo Toolbox Fuel Tank Best for Diesel 30 gallon, polyethylene, 12V pump, locking lid |
8.0 | 🛒 Check Price |
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Dee Zee 26 Gallon Aluminum Fuel Tank Toolbox Combo Compact Fit 26 gallon, aluminum, 12V pump, locking lid |
7.3 | 🛒 Check Price |
1. Transfer Flow 40 Gallon Combo Toolbox Fuel Tank: Best Overall
The Transfer Flow 40 Gallon Combo is the top pick in our evaluation. It uses a welded aluminum tank with a 5-year warranty, which we found to be the best corrosion protection among the models we compared. The integrated 12V pump delivers fuel at up to 15 gallons per minute, and the locking toolbox offers ample storage with diamond-plate aluminum. Owner feedback consistently praises the fit and finish, though some note the weight makes installation challenging without help.
However, this combo is not for everyone. The 40-gallon capacity adds significant weight, and the premium construction comes at a higher price point. If you have a smaller truck or need a lighter solution, consider a smaller model. Also, the pump is not submersible, so you must ensure the tank is not run completely dry to avoid priming issues.
- Aluminum construction with 5-year warranty resists corrosion
- High-flow 12V pump with integrated filter and shut-off
- Lockable diamond-plate toolbox with gas struts
Pros: Excellent build quality and corrosion resistance; High pumping speed (up to 15 GPM)
Cons: Heavy (over 100 lbs empty) may require two-person install
2. RDS Manufacturing 30 Gallon Aluminum Fuel Tank Toolbox Combo: Best Value
The RDS 30 Gallon Combo strikes an excellent balance between capacity and affordability. In our research, it offers one of the best value propositions with a durable aluminum tank and a reliable 12V pump. The powder-coated finish helps resist scratches, and the automatic shut-off nozzle is a nice safety feature. Owner reviews highlight the ease of installation and the snug fit in standard truck beds.
Where this combo falls short is toolbox volume. The storage area is a bit smaller than the Transfer Flow or ATI models, so if you carry many tools, you might find it cramped. Also, the pump is not as fast as some higher-end units, but it is sufficient for most refueling needs. If you prioritize cost savings and don’t need maximum storage, this is a solid choice.
- Lightweight aluminum tank with powder-coated finish
- 12V pump with automatic shut-off nozzle
- Lockable toolbox with weather-sealed lid
Pros: Great balance of capacity and weight; Competitive price for the features offered
Cons: Toolbox interior is slightly smaller than some competitors
3. ATI 50 Gallon Fuel Tank Toolbox Combo: Maximum Capacity
The ATI 50 Gallon Combo is for those who need maximum fuel capacity. With 50 gallons, it can extend your range significantly, which we found appealing for long-distance towing or remote job sites. The steel construction is tough, and the included pump system is functional. Owner feedback indicates that the tank fits well in full-size trucks and the toolbox is spacious.
However, the steel tank is prone to rust if the powder coating gets chipped, and the weight is a major drawback. Installation is a two-person job, and the added weight reduces payload capacity. Also, the pump is not as refined as some aluminum models. If you don’t absolutely need 50 gallons, a lighter aluminum option may serve you better.
- Massive 50-gallon capacity for long hauls
- Heavy-duty steel construction with black powder coat
- Includes 12V pump, hose, and nozzle
Pros: Largest fuel capacity in our comparison; Sturdy steel build feels strong
Cons: Very heavy (over 130 lbs empty) and prone to rust if scratched
4. Northern Tool 26 Gallon Steel Fuel Tank Toolbox Combo: Budget Pick
The Northern Tool 26 Gallon Combo is the budget option in our lineup. It uses a manual rotary pump, which eliminates the need for electrical wiring, making it simpler to install. The steel tank is basic but functional, and the locking toolbox provides secure storage. Owner reviews mention it works well for occasional use and fits smaller trucks nicely.
However, the manual pump is slow and can be tiring for frequent refueling. The steel tank lacks the corrosion resistance of aluminum, and some owners reported rust after a few years in humid climates. Also, the toolbox is not as solid as pricier models. If you only need to transfer fuel occasionally and want to save money, this could work, but we recommend stepping up to an aluminum model for longevity.
- Lowest price point among combos
- Manual rotary pump (no electricity needed)
- Steel tank with black finish
Pros: Very affordable; Simple manual operation
Cons: Manual pump is slow and requires effort; Steel construction may rust over time
5. Better Built 38 Gallon Aluminum Fuel Tank Toolbox Combo: Premium Build
The Better Built 38 Gallon Combo uses marine-grade aluminum, which we found offers superior corrosion resistance compared to standard aluminum. The tank is well-constructed, and the T-handle locking system is secure. Owner feedback highlights the clean look and good fit in full-size trucks. The 12V pump delivers 10 GPM, adequate for most needs.
However, the pump is slower than the Transfer Flow unit, and the price is on the higher side. Also, some owners noted that the toolbox lid doesn’t open as wide as they’d like, making access a bit awkward. If you prioritize corrosion resistance and are willing to pay more for it, this is a strong contender. Otherwise, you might get better pump performance elsewhere.
- Marine-grade aluminum tank for corrosion resistance
- 12V pump with 10 GPM flow rate
- T-handle locking system with weather stripping
Pros: Excellent corrosion resistance with marine-grade aluminum; Clean design and good fitment
Cons: Higher price point; Pump is not as powerful as some competitors
6. Titan Fuel Tanks 30 Gallon Combo Toolbox Fuel Tank: Best for Diesel
The Titan Fuel Tanks 30 Gallon Combo is unique in our comparison because it uses a rotomolded polyethylene tank. This material is completely rust-proof and lighter than steel or aluminum, which we found advantageous for diesel users. The pump is built with diesel-compatible seals, and the tank is UV-stabilized. Owner reviews appreciate the rust-free assurance and the lightweight installation.
However, this combo is strictly for diesel. Using it with gasoline could damage the plastic and pose a safety risk. Also, the toolbox is relatively small, and the plastic feels less premium than metal. The pump flow rate is average. If you run a diesel truck and want to avoid rust issues, this is a great option. For gasoline users, look elsewhere.
- Rotomolded polyethylene tank (no rust)
- 12V pump with diesel-rated components
- Lockable lid with weather-resistant seal
Pros: Polyethylene tank never rusts and is lightweight; Specifically designed for diesel fuel compatibility
Cons: Not suitable for gasoline (plastic may degrade); Toolbox is smaller than aluminum counterparts
7. Dee Zee 26 Gallon Aluminum Fuel Tank Toolbox Combo: Compact Fit
The Dee Zee 26 Gallon Combo is designed for smaller trucks with short beds. Its compact size allows it to fit where larger combos cannot, and the aluminum construction keeps weight low. Owner feedback indicates that installation is straightforward and the fit is good for Ford Ranger, Chevy Colorado, and similar models.
However, the trade-off is limited capacity. At 26 gallons, it offers the least fuel storage in our comparison, and the toolbox is small. The pump is also the slowest we evaluated, at 8 GPM, and some owners reported pump failure after a year. If you have a short-bed truck and need a combo, this is one of the few options, but we suggest considering a standalone toolbox and separate fuel tank if you need more capacity or reliability.
- Small footprint fits short-bed trucks
- Aluminum construction with black powder coat
- 12V pump with 8 GPM flow
Pros: Ideal for compact and short-bed trucks; Lightweight and easy to install
Cons: Small fuel capacity and toolbox space; Pump is slow and not very durable
Frequently Asked Questions
Can I install a fuel tank toolbox combo myself?
Yes, most combos are designed for DIY installation with basic tools. However, the weight of the unit (especially steel and larger aluminum models) may require a second person. You will need to drill mounting holes in the truck bed, connect the pump wiring to a power source, and secure the tank. Always follow the manufacturer’s instructions and local regulations regarding fuel tank installation.
Are fuel tank toolbox combos safe for gasoline?
Most combos with aluminum or steel tanks are safe for gasoline, provided they are properly grounded to prevent static discharge. Polyethylene tanks like the Titan model are not recommended for gasoline. Always check the manufacturer’s specifications and use approved hoses and pumps for the fuel type. We recommend installing a grounding kit for added safety.
How do I maintain the pump and tank?
Regularly inspect the tank for rust or damage, especially if it is steel. For aluminum tanks, check for corrosion at weld joints. Flush the tank annually to remove sediment. The pump should be used periodically to keep seals lubricated. Replace the fuel filter as recommended by the manufacturer. Avoid running the pump dry to prevent damage.
Will a fuel tank toolbox combo void my truck warranty?
Generally, aftermarket accessories do not void the entire vehicle warranty, but they can affect warranty coverage for related components. For example, if a fuel leak damages the engine, the warranty may not cover it. We recommend using a reputable installer and keeping all receipts. Some manufacturers offer combos that are CARB-compliant, which may help with emissions-related warranty issues.
What is the best material for a fuel tank toolbox combo?
Aluminum is the best balance of weight, corrosion resistance, and durability. It is lighter than steel and does not rust, though it can corrode if not properly coated. Steel is stronger and cheaper but heavy and prone to rust. Polyethylene is rust-proof and lightweight but only suitable for diesel and less rigid. We recommend aluminum for most users.
Our Verdict
After researching and comparing these seven fuel tank toolbox combos, our top pick is the Transfer Flow 40 Gallon Combo for its excellent build quality, corrosion-resistant aluminum, and high-performance pump. The runner-up is the RDS Manufacturing 30 Gallon Combo, which offers the best value for most truck owners with a good balance of capacity, features, and price. Choose based on your truck size, fuel capacity needs, and budget.
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