For truck owners needing to carry a substantial auxiliary fuel supply, a 100 gallon truck bed fuel tank is a critical investment. Whether you’re fueling heavy equipment on a remote job site, extending your truck’s range for long hauls, or supporting recreational vehicles, selecting the right tank is paramount for safety, efficiency, and compliance. Our team at MustCarBeast has thoroughly researched and compared a range of leading 100 gallon fuel tanks designed for truck bed applications.
In our evaluation, we focused on manufacturer specifications, published industry safety standards, and aggregated owner feedback to identify tanks that excel in durability, ease of installation, transfer performance, and overall value. We avoided any claims of hands-on testing and instead present evidence-based insights to guide your purchasing decision, ensuring you choose a reliable and compliant fuel storage solution.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Transfer Flow 0800115668 Auxiliary Fuel Tank System Top Pick DOT compliant with internal baffles for stability |
9.4 | 🛒 Check Price |
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RDS 72754 Auxiliary Fuel Tank, Rectangular Aluminum Strong Performer Bright aluminum finish with baffles for liquid control |
9.1 | 🛒 Check Price |
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ATI Auxiliary Fuel Tank, L-Shape Aluminum AL100 Durable Workhorse L-shape design for integration with toolboxes |
8.8 | 🛒 Check Price |
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Titan Fuel Tanks 5010098 Sidekick Auxiliary Fuel Tank System Innovative Choice High-density cross-linked polyethylene construction |
8.5 | 🛒 Check Price |
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Weather Guard 350-3-01 Transfer Tank, Steel Strong Utility Heavy-duty 14-gauge steel construction |
8.2 | 🛒 Check Price |
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Delta PRO 498000 Aluminum L-Shape Transfer Tank Solid Performer Rugged 0.125-inch polished aluminum construction |
7.9 | 🛒 Check Price |
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Northern Tool + Equipment 100 Gallon Aluminum L-Shape Transfer Tank Budget Friendly Basic L-shape aluminum tank for general use |
7.6 | 🛒 Check Price |
1. Transfer Flow 0800115668 Auxiliary Fuel Tank System: Top Pick
In our evaluation, the Transfer Flow 0800115668 stands out for its uncompromising build quality and advanced safety features. While its aluminized steel construction provides excellent durability and corrosion resistance, it does contribute to a heavier overall weight compared to aluminum alternatives. This added weight, especially when fully loaded, could impact payload capacity for some truck configurations more significantly than lighter tanks.
Truck owners with strict payload limits or those primarily seeking the lightest possible auxiliary tank for occasional use might find this model to be overkill. Its premium features and integrated system are best suited for serious users who prioritize maximum safety, long-term durability, and smooth operation, justifying the additional weight and initial investment.
- Heavy-duty 12-gauge aluminized steel construction for superior strength and corrosion resistance.
- Patented FuelWise system (optional, but standard for many models) integrates smoothly with truck's fuel gauge.
- Pressure and vacuum relief vent cap, fuel filler cap, and sending unit included for comprehensive setup.
Pros: Exceptional build quality and solid materials ensure long-term reliability.; Advanced safety features and DOT compliance offer confidence on the road.; Designed for smooth integration with modern truck fuel systems, minimizing user intervention.
Cons: Higher initial investment compared to more basic aluminum tanks.; Installation can be more complex due to integrated fuel system requirements.
2. RDS 72754 Auxiliary Fuel Tank, Rectangular Aluminum: Strong Performer
The RDS 72754 is a highly regarded auxiliary fuel tank, particularly noted for its sturdy aluminum construction and effective internal baffling. However, based on owner feedback, a common limitation is the lack of included accessories. Unlike some all-inclusive systems, this tank typically requires separate purchases for a transfer pump, hose, and mounting hardware to be fully operational.
This means that while the tank itself offers strong value, buyers must account for these additional components and their associated costs and installation efforts. Those looking for a truly ‘plug and play’ system right out of the box might find this a minor inconvenience, but for users comfortable sourcing their own peripherals, it remains an excellent, durable choice.
- Constructed from durable 0.125-inch thick aluminum, providing good strength without excessive weight.
- Internal baffles reduce sloshing and enhance stability during transport.
- Includes a 3/8-inch NPT reinforced bung for fuel transfer pump installation and 2-inch NPT fill cap.
Pros: Excellent balance of durability and lighter weight due to aluminum construction.; Commonly praised by owners for its straightforward installation and reliable performance.; Bright finish resists corrosion and maintains appearance over time.
Cons: Does not include a fuel transfer pump, requiring a separate purchase.; Mounting hardware is often sold separately, adding to the setup cost.
3. ATI Auxiliary Fuel Tank, L-Shape Aluminum AL100: Durable Workhorse
The ATI AL100 is an excellent choice for those who need to retain toolbox functionality in their truck bed while adding substantial fuel capacity. Its L-shape design is a significant advantage, but it also presents a potential minor drawback depending on your specific setup. In our evaluation, we noted that while the L-shape accommodates toolboxes, the placement of the pump bung can sometimes be less convenient for certain toolbox dimensions or if you prefer a specific pump orientation, potentially requiring creative routing of hoses.
This tank is ideal for users who have a specific need for both fuel storage and a toolbox in their truck bed. However, if you do not use a truck bed toolbox or prefer a simpler, rectangular tank footprint for maximum pump access flexibility, a different model might offer a marginally more straightforward installation experience.
- Heavy-duty 0.125-inch aluminum construction ensures resistance to punctures and corrosion.
- Features an L-shape design to accommodate most standard truck bed toolboxes.
- Includes a reinforced bung for pump attachment and an anti-siphon device for security.
Pros: L-shape design maximizes truck bed utility, allowing for a toolbox alongside.; Durable aluminum build offers excellent longevity and resistance to elements.; Anti-siphon device adds a layer of security against fuel theft.
Cons: Mounting hardware often needs to be purchased separately.; The L-shape design, while flexible, can sometimes limit pump access depending on toolbox placement.
4. Titan Fuel Tanks 5010098 Sidekick Auxiliary Fuel Tank System: Innovative Choice
The Titan Fuel Tanks 5010098 offers a modern approach with its high-density polyethylene construction, which is a significant advantage for corrosion resistance and weight reduction. However, while incredibly durable for its material type, polyethylene is generally less rigid and, in very specific, high-impact scenarios, might not withstand the same level of blunt force trauma as heavy-gauge steel or thick aluminum. This is a theoretical rather than common practical issue, but worth noting for certain applications.
This tank is an excellent option for those seeking a lightweight, rust-proof solution with automated fuel transfer. However, if your operations involve extremely rugged environments where the tank could be exposed to severe impacts from falling debris or heavy tools, and you prioritize maximum impact resistance above all else, a strong metal tank might provide an additional layer of perceived security.
- Constructed from military-grade, cross-linked polyethylene, offering corrosion resistance and durability.
- Designed to integrate with the truck's OEM fuel system for automatic fuel transfer.
- Includes a digital fuel gauge and all necessary sending units and wiring for installation.
Pros: Polyethylene construction is rust-proof and lighter than steel or aluminum.; Features an automatic fuel transfer system for hassle-free operation.; Includes a digital fuel gauge, offering precise monitoring of auxiliary fuel levels.
Cons: Polyethylene may not be as puncture-resistant as heavy-gauge metal in extreme conditions.; Some owners report the installation of the integrated system can be time-consuming.
5. Weather Guard 350-3-01 Transfer Tank, Steel: Solid Utility
The Weather Guard 350-3-01 is a sign of rugged durability, thanks to its heavy-gauge steel construction. While this provides superior impact resistance and a solid feel, the primary trade-off is its considerable weight. When fully loaded with 100 gallons of fuel, the combined weight of the tank and fuel can significantly reduce a truck’s available payload capacity, which is a critical consideration for many commercial and heavy-duty users.
This tank is an ideal choice for those who prioritize maximum physical protection and are less concerned about the added weight impacting their truck’s overall carrying capacity. However, if your truck’s payload is frequently maximized or if you are seeking to minimize overall vehicle weight for fuel efficiency or other reasons, an aluminum or polyethylene tank might be a more suitable alternative.
- Built with sturdy 14-gauge steel, offering exceptional strength and security.
- Features a durable black ARMOR TUF Powder Coat finish for superior corrosion resistance.
- Includes a reinforced bung for pump mounting and a lockable cap for security.
Pros: Steel construction provides excellent impact resistance and overall durability.; Powder coat finish protects against rust and maintains a professional appearance.; Integrated baffles help control fuel sloshing during transit.
Cons: Significantly heavier than aluminum or polyethylene tanks, impacting payload.; The steel construction can be more susceptible to rust if the powder coat is compromised.
6. Delta PRO 498000 Aluminum L-Shape Transfer Tank: Solid Performer
The Delta PRO 498000 offers a compelling combination of capacity and an L-shape design in polished aluminum, making it a solid choice for many users. However, in our research and based on aggregated owner feedback, some reports indicate that the overall fit and finish, particularly around welds and seams, might not consistently match the precision seen in higher-tier, more premium brands. While this generally does not impact functional integrity, it can be a minor aesthetic concern for some.
This tank is well-suited for users who prioritize functional utility, aluminum construction, and an L-shape design at a competitive value point. However, if you are particularly meticulous about flawless craftsmanship and expect the highest levels of aesthetic perfection in every detail, you might consider investing in a more premium-priced alternative.
- Constructed from 0.125-inch thick polished aluminum for durability and a clean look.
- Features a full-width continuous hinge and a lockable cap for security.
- Internal baffles are designed to prevent fuel slosh during transport.
Pros: Polished aluminum finish is aesthetically pleasing and corrosion resistant.; L-shape design allows for convenient storage of a crossover toolbox.; Generally considered a good value for its capacity and material.
Cons: Some owners report that the fit and finish can be inconsistent compared to premium brands.; Transfer pump and installation hardware are typically sold separately.
7. Northern Tool + Equipment 100 Gallon Aluminum L-Shape Transfer Tank: Budget Friendly
The Northern Tool + Equipment 100 Gallon Aluminum L-Shape Transfer Tank serves as a functional and budget-friendly option for auxiliary fuel storage. However, based on our evaluation of specifications and owner comments, note that the mounting system and included hardware are often quite basic. This means users might need to invest in additional, more durable mounting solutions or custom fabricate brackets to ensure the tank is secured to the truck bed with maximum confidence, especially in demanding applications.
This tank is an excellent choice for users who are comfortable with light fabrication or supplementing basic hardware to achieve a secure installation, and for whom cost is a primary concern. However, if you prefer an ‘install and forget’ solution with a fully engineered, strong mounting system included, and are not inclined to source additional hardware, a higher-priced model might offer a more complete package.
- Constructed from 0.125-inch thick aluminum for a balance of strength and weight.
- L-shape design allows for convenient placement alongside a standard truck toolbox.
- Includes a reinforced bung for pump connection and a vented cap.
Pros: Offers a cost-effective solution for a 100-gallon aluminum L-shape tank.; Aluminum construction provides good corrosion resistance and lighter weight.; Straightforward design is easy to understand and integrate.
Cons: May lack some of the advanced features and refined finishes of premium tanks.; Mounting points and hardware are basic and may require user adaptation for optimal security.
Frequently Asked Questions
What regulations apply to carrying 100 gallons of fuel in a truck bed?
Carrying 100 gallons of fuel typically falls under federal and state regulations, primarily DOT (Department of Transportation) rules for transporting hazardous materials. Tanks must be DOT compliant, which includes specifications for material, construction, venting, and secure mounting. Always check local and state laws, as some regions have additional requirements regarding capacity limits, labeling, and operator licensing for certain fuel types.
Do I need a special pump for a 100 gallon fuel tank?
Yes, you will need a fuel transfer pump designed for the type of fuel you’re carrying (e.g., diesel or gasoline). These tanks typically come with a reinforced bung for pump attachment. Pumps vary in flow rate, power source (12V DC electric is common), and features like auto-shutoff nozzles. Ensure the pump is rated for continuous duty if you plan frequent or long transfers.
How do I securely mount a 100 gallon fuel tank in my truck bed?
Secure mounting is crucial for safety. Tanks should be bolted directly to the truck bed through reinforced mounting tabs, not merely strapped down. Use heavy-duty bolts, washers, and lock nuts. Many tanks require purchasing specific mounting kits separately. Always follow the manufacturer’s installation instructions and ensure the tank is positioned to distribute weight evenly and avoid interference with other truck components.
What's the difference between aluminum and steel fuel tanks?
Aluminum tanks are lighter, corrosion-resistant, and generally more expensive. They are suitable for users concerned about payload capacity. Steel tanks are heavier, offer superior impact resistance, and are typically more budget-friendly. They are often powder-coated to prevent rust, but if the coating is compromised, rust can occur. Both materials, when properly constructed and maintained, provide reliable fuel storage.
Can I use these tanks for gasoline as well as diesel?
Not all tanks are rated for both fuel types. Tanks specifically designed for gasoline often have stricter venting requirements and material compatibility. Always verify the manufacturer’s specifications for the specific tank model to ensure it is approved for gasoline use. Using a tank for an unapproved fuel type can void warranties and, more importantly, create significant safety hazards.
Our Verdict
After extensive research and comparison, the Transfer Flow 0800115668 Auxiliary Fuel Tank System emerges as our top pick for the best 100 gallon fuel tank for a truck bed. Its exceptional build quality, advanced safety features, and smooth integration capabilities deliver unparalleled confidence on the road and performance. For a strong runner-up that balances durability with a lighter footprint, the RDS 72754 Auxiliary Fuel Tank stands out, offering solid aluminum construction and reliable performance at a compelling value, making it an excellent choice for many users.
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