Choosing the right fuel tank for a truck bed involves balancing capacity, durability, safety features, and installation compatibility. This guide highlights five strong options and provides a practical buying guide to help you compare models used for auxiliary fueling, transport, or under-bed mounting. Each option balances rugged construction with user-friendly features, so you can find a solution that fits your truck and your fuel needs.
Summary of selected products
- Better Built 36-Gallon Steel Transfer Tank
- RDS MFG INC 45-Gallon Rectangular Auxiliary Tank
- VEVOR 58-Gallon Portable Diesel Tank with 12V Pump
- Spectra Premium GM23B Fuel Tank
- RDS MFG INC 60-Gallon Fuel Tank
Better Built 36-Gallon Steel Transfer Tank
The Better Built model is a rectangular steel transfer tank with a generous 36-gallon capacity, ideal for mid-sized auxiliary fueling needs. Its built-in overfill restriction helps prevent spills at the pump, enhancing safety during refueling operations. The tank also features internal baffles that reinforce rigidity and minimize shifting of contents during transport, which is especially beneficial when the tank is mounted in or near a truck bed. The combination of robust steel construction and spill-prevention features makes this option well-suited for fleet use or personal heavy-duty use where reliability matters.
Key features include:
- Large 36-gallon capacity for extended fueling between fills
- Automatic shutoff at the pump to prevent overfill spills
- Built-in baffles to reduce contents shifting during transport
RDS MFG INC 45-Gallon Rectangular Auxiliary Tank
The RDS MFG INC 45-Gallon Auxiliary Tank is designed for versatile fueling scenarios, including gasoline auxiliary fueling when siphoned from the top with an electric pump. The tank’s fully welded seams contribute to durability and longevity in rugged environments, making it suitable for trucking setups and off-road applications where a capable retention system is required. RDS emphasizes a broad lineup of tanks in various capacities, enabling a precise fit for different bed widths and mounting configurations.
Key features include:
- Full assortment of capacities to fit specific needs
- Gasoline auxiliary fueling via electric pump
- Fully welded seams for enhanced durability
VEVOR 58-Gallon Portable Diesel Tank
The VEVOR portable diesel tank is designed for versatile, on-the-go fuel transfers. With a 58-gallon capacity, a 12V electric transfer pump, and a substantial 10 GPM flow rate, it supports efficient refueling for multiple vehicles or equipment. The 12-volt pump is paired with a practical 13.1-foot rubber hose for flexible reach. The unit includes a mechanical fuel gauge to monitor diesel levels in real time, helping to prevent overfilling. Built with a durable polyethylene construction, the tank is designed to withstand varying weather conditions and UV exposure, making it a practical choice for remote work sites and job sites where portability is essential.
Key features include:
- 58-gallon capacity with 10.6 GPM flow rate
- 12V electric transfer pump and 13.1-foot hose
- Mechanical fuel gauge and lockable lid for security
- Duplex filtration system for improved fuel purity
Spectra Premium GM23B Fuel Tank
The Spectra Premium GM23B fuel tank is designed to align with OE fit, form, and function requirements, leveraging OE fuel system design expertise to streamline installation and maintenance. A lock ring is included to reduce installation time and help ensure a complete repair. Made with corrosion-resistant Ni-Terni steel, this tank emphasizes durability and reliability, particularly for users seeking a factory-style replacement that preserves original system performance. The GM23B is positioned as a solid choice for direct replacement in vehicles needing an exact, ready-to-install tank.
Key features include:
- OE fit and function
- Lock ring included to speed up installation
- Corrosion-resistant Ni-Terni steel for durability
RDS MFG INC 72771 Fuel Tank
The RDS MFG INC 72771 fuel tank emphasizes a practical approach to exterior mounting with a locking automotive-style fill cap for added security. The aluminum construction helps resist corrosion and maintain durability in outdoor environments. This tank is designed for exterior areas, making it suitable for under-bed installations or other strategic placements where weather exposure is a consideration. The locking cap supports theft deterrence during vehicle downtime or transport in unsecured locations.
Key features include:
- Locking automotive-style fill cap
- Exterior-area design for versatile mounting
- Aluminum tank to resist rust and corrosion
RDS MFG INC Fuel Tank – 60-Gallon
The 60-gallon unit from RDS MFG INC expands capacity for longer fueling intervals and is designed to fit specific bed configurations. It supports gasoline auxiliary fueling via siphoning from the top with an electric pump, providing a practical solution for larger trucks or setups requiring extended fuel storage. The model’s larger capacity makes it a strong candidate for fleet applications or conversion builds where storage efficiency and range matter. Buyers should measure bed dimensions to ensure compatibility with their vehicle.
Key features include:
- High capacity for extended fueling needs
- Gasoline auxiliary fueling with electric pump
- Bed-fit considerations for compatibility
Buying Guide: Key Purchase Considerations And Comparisons
- Capacity vs. space: Determine how much fuel you need versus the available bed space. Larger tanks offer extended range but may require specific mounting and clearance.
- Material and durability: Steel tanks are robust and durable but heavier; aluminum and high-quality plastics offer lighter weight with sufficient strength for many applications. Consider corrosion resistance in outdoor environments.
- Mounting method: Some tanks are designed for under-bed or exterior mounting, while others are portable. Verify compatibility with your truck bed, mounting brackets, and existing fuel system components.
- Safety features: Look for overfill protection, secure caps, lockable lids, and reinforced baffles to prevent fuel movement and spills during transport.
- Fuel type and compatibility: Ensure the tank supports your intended fuel (gasoline, diesel, or other) and that the pump or siphon system integrates smoothly with your vehicle’s fueling system.
- Installation effort: OE-like tanks or those with lock rings may simplify installation. Consider whether you need professional installation or can perform a DIY setup with guidance from the manufacturer.
- Maintenance and filtration: Some models include filtration or gauge features to monitor fuel levels and purity. This can affect long-term performance and maintenance needs.
- Security and theft deterrence: Lockable lids and secure fill caps can help protect fuel when the vehicle is parked or left unattended.
- Warranty and support: Check manufacturer warranties and available after-sales support, especially for fleet deployments or commercial use.
- Fit for bed length and configuration: For under-bed or long-bed trucks, verify the tank dimensions to avoid interference with suspension, exhaust, or other components.