Finding the right auxiliary fuel tank for a truck can extend range, improve efficiency, and support long-haul operations. This guide highlights five reliable options featuring different capacities, materials, and configurations to fit various beds and use cases. Each listing includes essential specs and common benefits to help you compare quickly.
Summary of Selected Products
| Product | Brand | Capacity | Key Benefit |
|---|---|---|---|
| RDS MFG INC Fuel Tank – 60-Gallon | MFG INC | 60 Gallon | Top-siphoned electric pump option |
| RDS MFG INC 71083 Rectangular Auxiliary/Transfer Fuel Tank – 45 Gallon | MFG INC | 45 Gallon | Versatile rectangular design, welded seams |
| Better Built Steel Transfer Tank – 36-Gallon | Built | 36 Gallon | Overfill shutoff, internal baffles |
| Dee Zee DZ92647SB (92 gallon) Black Steel Combo Transfer Tank & Tool Box | ZEE | 92 Gallon | Combo transfer tank with toolbox |
| RDS MFG INC – 72548 Fuel Transfer Tank/Toolbox Combo – 60 Gallon | MFG INC | 60 Gallon | Transfer tank with toolbox option |
RDS MFG INC Fuel Tank – 60-Gallon
Brand: MFG INC. Capacity: 60 gallons. This RDS fuel tank line is designed to fit a variety of pickup configurations and emphasizes compatibility with gasoline fueling via an electric pump siphoned from the top. It notes compatibility with some short bed trucks, so measuring before ordering is recommended. The design prioritizes fit and modularity for certain vehicle layouts, offering a practical option for extended range without a full refuel stop.
RDS MFG INC 71083 45-Gallon Tank
Brand: MFG INC. Capacity: 45 gallons. This rectangular auxiliary/transfer tank is described with full welding for durability, and supports gasoline auxiliary fueling when siphoned from the top via an electric pump. The rectangular form factor can fit adaptable spaces, making it a versatile choice for varied bed dimensions where a compact but capable auxiliary tank is desired.
Better Built Steel Transfer Tank – 36-Gallon
Brand: Built. Capacity: 36 gallons. This steel transfer tank emphasizes reliability with a large capacity for its size and includes an overfill restriction that provides an automatic shutoff at the pump to prevent spills. Built-in baffles enhance stability by reducing sloshing during transport, which can help maintain balance and reduce movement on rough roads.
Dee Zee DZ92647SB 92-Gallon Combo Tank & Toolbox
Brand: ZEE. Capacity: 92 gallons. This combo unit combines a transfer tank with a toolbox, providing convenient storage alongside fuel capacity. Powder-coated NRT coating adds corrosion protection, and the 14-gauge steel construction supports durability in demanding environments. This option suits users who want integrated storage with their fuel system, reducing the need for separate compartments.
RDS MFG INC – 72548 Tank & Toolbox Combo – 60 Gallon
Brand: MFG INC. Capacity: 60 gallons. This combo setup combines a fuel transfer tank with a toolbox, designed for comprehensive utility on trucks that need both fuel and tool storage. The listing notes dimensional specifications and origin (United States), indicating a product geared toward professional use with a focused approach to durability and practical organization.
Buying Guide: Key Purchase Considerations
When selecting an auxiliary fuel tank for a truck, consider capacity, bed fit, material, and installation needs. If you frequently travel long distances without easy refueling, larger tanks (like the 60–92 gallon options) can reduce stops but may require extra space or modifications. Rectangular tanks can offer better bed compatibility on certain trucks, while round tanks may fit more easily in curved spaces. Steel tanks tend to be robust and corrosion-resistant, but coatings and baffles can also extend life and reduce fuel slosh.
Important factors include:
- Fit and compatibility: Measure bed dimensions and bed rail spacing; verify clearance with exhaust, suspension, and spare tire locations.
- Material and finish: Steel with protective coatings resists corrosion; consider powder coating for long-term protection in harsh environments.
- Fuel type compatibility: Most listed options support gasoline fueling via electric pumps, but confirm compatibility with your fuel system and vehicle’s pump design.
- Seals, welds, and durability: Full-welded seams and internal baffles reduce leaks and minimize fuel movement during transport.
- Additional features: Toolboxes or integrated storage add functionality; consider whether you need a combination unit or a standalone tank.
- Installation considerations: Some tanks require professional mounting or specific mounting kits; verify installation steps and required hardware.
Performance and safety should guide your choice. Tanks with automatic shutoff features help prevent spills, while well-supported designs reduce the risk of sloshing and damage during transit. For mixed-use needs, toolbox-integrated options offer added utility, helping organize tools and fuel access in one package. Compare dimensions, mounting options, and compatibility with your truck model to identify the best fit for your operation.