Buying Guide
Choosing the best truck fuel transfer tanks is mostly about matching the tank to how the truck is used, what fuel it carries, and where the tank will sit in the bed. The right capacity, footprint, and construction materials all matter before moving on to pumps and fittings, and the categories below walk through each decision point using only the products included in this top 10. A specification-based approach keeps the focus on documented features rather than on impressions, which helps when comparing steel and aluminum designs side by side.
Capacity and Bed Layout
The best truck fuel transfer tanks start with the right capacity and the right shape for the bed. Vertical and slim rectangular tanks, like the RDS MFG INC 37-Gallon Auxiliary Fuel Tank and the RDS MFG INC 45-Gallon Aluminum Rectangular Transfer Tank, fit behind or beside the wheel well where height is limited. Each of these tanks uses a low 9- or 9.5-inch profile that keeps the tank close to the bed floor, leaving room for cargo or other equipment next to the tank. Square tanks, such as the Jobox Crescent 50-Gallon Square Steel Transfer Tank, drop into a corner of the bed and leave the rest of the bed open for tools or for a partner toolbox. The symmetrical 24-inch footprint of the Jobox tank can sit in either front corner depending on pump placement.
Larger L-shape combos, like the Dee Zee 92-Gallon L-Shape Steel Combo Transfer Tank & Tool Box, reuse the side of the bed for both fuel and a tool box. The RDS MFG INC 60-Gallon Transfer Tank & Toolbox Combo and the Dee Zee 43-Gallon Aluminum Combo Transfer Tank & Tool Box also follow this combo layout, sitting across the bed rather than behind the cab. These three combo units free up the front of the bed for cargo and use the toolbox section for storage, which is helpful when the truck has limited aftermarket storage options. Taller units in the list, such as the Better Built Trail FX Steel Transfer Tank and the Trail FX 35-Gallon Vertical Aluminum Transfer Tank, use their height to fit 35-gallon capacities in a narrow vertical footprint next to the bed rail.
Construction and Materials
Steel and aluminum dominate the category, and the selected list shows both sides clearly. Steel tanks, including the Better Built 36-Gallon Rectangular Steel Transfer Tank, the Jobox Crescent 50-Gallon Square Steel Transfer Tank, and the Better Built Trail FX Steel Transfer Tank, offer heavier shells and a thicker wall thickness for impact resistance. The Better Built 36-Gallon sits in a rectangular format with flush-mounted bungs, while the Jobox Crescent uses a square format with reinforced bungs on both sides. The Better Built Trail FX is a heavier 85-pound steel tank with a corrosion-resistant finish, which is a useful option for trucks that park outdoors for long periods.
Aluminum tanks, such as the Trail FX 35-Gallon Vertical Aluminum Transfer Tank, the RDS MFG INC 45-Gallon Aluminum Rectangular Transfer Tank, the RDS MFG INC 37-Gallon Auxiliary Fuel Tank, and the RDS MFG INC 60-Gallon Auxiliary Fuel Tank, lower tank weight and avoid rust concerns. The Dee Zee 43-Gallon Aluminum Combo Transfer Tank & Tool Box uses aluminum for the same corrosion advantage while pairing the tank with a tool box. The Dee Zee 92-Gallon L-Shape Steel Combo Transfer Tank & Tool Box adds a powder coat to extend surface life, which is especially helpful on work trucks that see brush and gravel along rural routes. Choosing between these materials is largely a question of weight versus wall thickness and how the truck is used.
Baffling and Slosh Control
Internal baffles limit fuel movement while driving and strengthen the tank walls. The Better Built 36-Gallon Rectangular Steel Transfer Tank and the Jobox Crescent 50-Gallon Square Steel Transfer Tank both list internal baffles, which makes them strong choices for capacity levels where slosh can be more noticeable. The Jobox baffles are documented alongside the lifting rings and reinforced bungs, giving a full picture of how the tank is reinforced. When the tank is not baffled, slosh control may rely on the mounting method and driving habits, which can become a concern for higher-capacity tanks such as the 60-gallon and 92-gallon combo options in the list. Drivers who transfer fuel regularly on rough roads usually value tanks that document baffle construction more than ones that simply state a capacity number.
Transfer-Ready Features
For pump-ready installs, look for vented caps, lockable filler caps, recessed drain plugs, and 2-inch NPT bungs for pump mounting. The Jobox Crescent 50-Gallon Square Steel Transfer Tank lists 2-inch NPT reinforced bungs on both sides, which lets the pump be mounted on either side depending on the bed layout. The Better Built 36-Gallon Rectangular Steel Transfer Tank lists 2-inch flush-mounted inlet and outlet bungs. The Better Built Trail FX Steel Transfer Tank and the Trail FX 35-Gallon Vertical Aluminum Transfer Tank both ship with a lockable cap, venting coupler, and recessed drain plug for a complete transfer setup. These features save time during install and keep the system serviceable in the field, since the right bung sizes remove the need for adapters that can leak under pressure.
Mounting and Security
Mounting tabs, heavy-duty brackets, and lockable caps vary by model. The Jobox Crescent 50-Gallon Square Steel Transfer Tank includes heavy-duty brackets to secure the tank to the bed, and a lockable filler cap to keep fuel from being siphoned. The Better Built 36-Gallon Rectangular Steel Transfer Tank adds a lockable cap for security without complicating the install. The Better Built Trail FX Steel Transfer Tank and the Trail FX 35-Gallon Vertical Aluminum Transfer Tank both include a lockable cap as well, helping protect transferred fuel on parked trucks. The L-shape combos, including the Dee Zee 92-Gallon L-Shape Steel Combo Transfer Tank & Tool Box and the Dee Zee 43-Gallon Aluminum Combo Transfer Tank & Tool Box, rely on the toolbox mounting points to anchor the tank plus storage as a single unit. The RDS MFG INC 60-Gallon Transfer Tank & Toolbox Combo follows the same combo mounting pattern, keeping the toolbox and tank tied together.
Warranty and Compliance
Warranty coverage ranges from 30 days for some aluminum tanks, including the Better Built Trail FX Steel Transfer Tank and the Trail FX 35-Gallon Vertical Aluminum Transfer Tank, to a 3-year warranty on the Better Built 36-Gallon Rectangular Steel Transfer Tank. The Jobox Crescent 50-Gallon Square Steel Transfer Tank carries a 1-year manufacturer warranty, and the RDS MFG INC products carry manufacturer warranties that vary by model. Buyers who plan to use the tank for highway fueling or commercial fleets should check whether the tank publishes DOT compliance language in its listing before finalizing the install. The RDS MFG INC 60-Gallon Auxiliary Fuel Tank, the RDS MFG INC 45-Gallon Aluminum Rectangular Transfer Tank, and the RDS MFG INC 37-Gallon Auxiliary Fuel Tank all include manufacturer warranty information in their listings, which is a useful baseline for commercial use.
Final recommendation
Jobox Crescent 50-Gallon Square Steel Transfer Tank ranks first overall in this specification-based comparison under the published weighted criteria.
The final choice among the best truck fuel transfer tanks depends on the documented features that match your intended use.
The Jobox Crescent 50-Gallon Square Steel Transfer Tank earns the first overall specification-based choice among the top truck fuel transfer tanks thanks to its balanced 50-gallon capacity, internal baffles, reversible 2-inch NPT pump mounting on both sides, lifting rings, and heavy-duty brackets. For buyers focused on large capacity plus storage, the Dee Zee 92-Gallon L-Shape Steel Combo Transfer Tank & Tool Box and the RDS MFG INC 60-Gallon Transfer Tank & Toolbox Combo are strong heavy-duty picks. For lighter, rust-resistant setups, the RDS MFG INC 45-Gallon Aluminum Rectangular Transfer Tank, the Trail FX 35-Gallon Vertical Aluminum Transfer Tank, and the RDS MFG INC 37-Gallon Auxiliary Fuel Tank are solid options. The Better Built 36-Gallon Rectangular Steel Transfer Tank suits drivers who want a mid-size steel tank with overfill protection, while the Better Built Trail FX Steel Transfer Tank and the Dee Zee 43-Gallon Aluminum Combo Transfer Tank & Tool Box round out balanced picks for durability and combo storage. The RDS MFG INC 60-Gallon Auxiliary Fuel Tank is a strong fit for operators who want a long, narrow 60-gallon tank behind the cab.
Frequently Asked Questions
What is the best truck fuel transfer tank for a full-size bed?
For a full-size bed, the Dee Zee 92-Gallon L-Shape Steel Combo Transfer Tank & Tool Box and the RDS MFG INC 60-Gallon Transfer Tank & Toolbox Combo stand out for combining high capacity with built-in tool box storage. For a more compact square footprint, the Jobox Crescent 50-Gallon Square Steel Transfer Tank fits a 50-gallon capacity into a 24-inch square profile that leaves room for cargo alongside the tank. The Dee Zee 43-Gallon Aluminum Combo Transfer Tank & Tool Box is also a strong match when an aluminum body is preferred over steel, while the Better Built 36-Gallon Rectangular Steel Transfer Tank fits a mid-size 36-gallon capacity into a rectangular footprint that sits closer to the cab.
Are the best truck fuel transfer tanks designed for diesel only?
Most transfer tanks in this category are designed for diesel or non-flammable liquids, and the products listed here clearly hold that scope. The RDS MFG INC auxiliary tanks, including the 37-gallon, 45-gallon, and 60-gallon models, allow gasoline fueling only when siphoned through an electric fuel pump, which is a different use case from typical transfer tank installs. The Dee Zee 92-Gallon L-Shape Steel Combo Transfer Tank & Tool Box and the Dee Zee 43-Gallon Aluminum Combo Transfer Tank & Tool Box are positioned for diesel and non-flammable fuels in their listing specifications. The Better Built Trail FX Steel Transfer Tank and the Trail FX 35-Gallon Vertical Aluminum Transfer Tank also focus on transfer-ready venting and drainage, which is most often used for diesel transfer. Always check the manufacturer’s specifications before using any of these tanks for gasoline service.
Do I need a baffled transfer tank?
Baffling helps reduce fuel slosh and strengthens the tank shell, especially for larger capacities. The Better Built 36-Gallon Rectangular Steel Transfer Tank and the Jobox Crescent 50-Gallon Square Steel Transfer Tank both list internal baffles, which makes them strong choices for drivers who travel rougher roads. For tanks that do not document baffle construction, slosh control may rely more on mounting and driving habits, which can be a concern for the 60-gallon and 92-gallon options in the list. The RDS MFG INC 60-Gallon Transfer Tank & Toolbox Combo and the RDS MFG INC 60-Gallon Auxiliary Fuel Tank are both large-capacity units where baffle documentation would matter most, and drivers should check the listing details before relying on those tanks for slosh-sensitive work.
How are transfer tanks mounted to the truck bed?
Most tanks use mounting tabs or heavy-duty brackets that are either included or listed as part of the package. The Jobox Crescent 50-Gallon Square Steel Transfer Tank includes heavy-duty brackets to secure the tank to the bed, and the combo units, including the Dee Zee 92-Gallon L-Shape Steel Combo Transfer Tank & Tool Box, the Dee Zee 43-Gallon Aluminum Combo Transfer Tank & Tool Box, and the RDS MFG INC 60-Gallon Transfer Tank & Toolbox Combo, use the toolbox mounting points to anchor the tank plus storage as a single unit. The Better Built 36-Gallon Rectangular Steel Transfer Tank and the Better Built Trail FX Steel Transfer Tank also emphasize lockable caps and durable shells for long-term bed mounting. The Trail FX 35-Gallon Vertical Aluminum Transfer Tank uses its vertical profile to fit standard bed rails, and the RDS MFG INC 45-Gallon Aluminum Rectangular Transfer Tank uses its 9.5-inch height to sit behind the wheel well while still being securely bracketed to the bed frame.
Which top truck fuel transfer tanks work for a short bed?
The RDS MFG INC 60-Gallon Auxiliary Fuel Tank and the RDS MFG INC 60-Gallon Transfer Tank & Toolbox Combo both list footprints that fit short beds, with the auxiliary tank listing recommending measuring before ordering. Slim tanks like the RDS MFG INC 37-Gallon Auxiliary Fuel Tank and the RDS MFG INC 45-Gallon Aluminum Rectangular Transfer Tank are also a good fit for tight bed layouts, since their low 9- to 9.5-inch heights leave clearance over the wheel well while still delivering reasonable capacity. The Better Built 36-Gallon Rectangular Steel Transfer Tank and the Trail FX 35-Gallon Vertical Aluminum Transfer Tank both fit shorter beds when their dimensions are confirmed against the available space, and the Jobox Crescent 50-Gallon Square Steel Transfer Tank can drop into a corner of a short bed when side access is the priority.
