After researching manufacturer specifications, published industry standards, and aggregated owner feedback, we compared seven top diesel tanks for trucks. Our evaluation focuses on build quality, safety features, ease of installation, and real-world reliability. We found that the best choice depends on your truck’s configuration, typical usage, and budget. Below are our findings to help you make an informed decision.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Transfer Flow 50 Gallon Replacement Fuel Tank Best Overall 50 gallons, aluminum, OEM-fit for Ford F-250/F-350 Super Duty |
9.2 | 🛒 Check Price |
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S&B Filters 60 Gallon Fuel Tank Best Capacity 60 gallons, rotationally molded polyethylene, fits Ram 2500/3500 |
8.9 | 🛒 Check Price |
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Titan Fuel Tanks 52 Gallon Replacement Tank Best Fit for GM Trucks 52 gallons, steel, direct fit for Chevy Silverado/GMC Sierra 2500HD/3500HD |
8.7 | 🛒 Check Price |
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RDS Manufacturing 50 Gallon Diesel Tank Best for Toolbox Integration 50 gallons, steel, L-shaped design fits in truck bed with toolbox |
8.2 | 🛒 Check Price |
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Aero Tanks 58 Gallon Fuel Tank Best Lightweight Option 58 gallons, aluminum, fits Ford F-350 and Ram 3500 dually |
8.0 | 🛒 Check Price |
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Northern Tool + Equipment 40 Gallon Diesel Fuel Tank Best Budget Pick 40 gallons, steel, rectangular tank for truck bed |
7.8 | 🛒 Check Price |
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LMC Truck 50 Gallon Diesel Fuel Tank Best Classic Truck Fit 50 gallons, steel, replacement for 1973-1991 GM square-body trucks |
7.4 | 🛒 Check Price |
1. Transfer Flow 50 Gallon Replacement Fuel Tank: Best Overall
In our evaluation, the Transfer Flow 50 Gallon Replacement Fuel Tank stands out for its OEM-level fit and construction. Designed specifically for Ford Super Duty trucks, it replaces the factory tank without modifications. The aluminum body resists rust and the internal baffles minimize fuel slosh. Owner feedback consistently praises the straightforward installation and noticeable increase in range.
However, this tank carries a higher price point than some steel options. It is not suitable for trucks with aftermarket lift kits or modified exhaust systems that may interfere with the tank’s position. For owners seeking a direct fit and long-term durability, this is a top contender, but those on a tighter budget may want to consider alternatives.
- Bolts directly to factory mounting points, no cutting or drilling required
- Aluminum construction with internal baffles for fuel stability
- Includes all necessary hardware, hoses, and sending unit
Pros: Smooth installation with factory-like fit; Corrosion-resistant aluminum with long service life
Cons: Premium price compared to steel alternatives
2. S&B Filters 60 Gallon Fuel Tank: Best Capacity
The S&B Filters 60 Gallon Fuel Tank offers the largest capacity in our comparison, ideal for heavy towing or remote travel. Its rotationally molded polyethylene is lightweight and impervious to corrosion. Owner feedback indicates that the tank fits well on Ram 2500 and 3500 trucks, though some report needing to trim a small amount of plastic trim for a perfect fit.
One limitation is that the plastic material can be more susceptible to impact damage than aluminum or steel. Also, the tank’s size may reduce ground clearance slightly, which could be a concern for off-road use. For highway and towing applications, this tank provides excellent value, but off-roaders may prefer a metal option.
- 60-gallon capacity for extended range on long hauls
- Rotomolded construction with UV-resistant coating
- Includes fuel sending unit and installation kit
Pros: Extra capacity without significant weight penalty over steel; Corrosion-proof plastic body
Cons: May require minor trimming on some models
3. Titan Fuel Tanks 52 Gallon Replacement Tank: Best Fit for GM Trucks
For GM truck owners, the Titan Fuel Tanks 52 Gallon Replacement Tank is a researched favorite. It is designed to bolt directly in place of the original tank on Chevy Silverado and GMC Sierra HD models. The steel body is strong and the powder coat finish helps resist rust. Based on owner feedback, the installation is straightforward and the included components are complete.
The main downside is weight; steel adds about 30 pounds more than an equivalent aluminum tank. Additionally, some users noted that the sending unit may need calibration for accurate gauge readings. This tank is a solid choice for those prioritizing durability and fit over weight savings.
- Direct replacement for factory tank with no modifications
- Heavy-duty steel with powder coat finish
- Comes with new sending unit, gasket, and straps
Pros: Excellent fit for GM HD trucks; Durable steel construction with corrosion-resistant coating
Cons: Heavier than aluminum alternatives
4. RDS Manufacturing 50 Gallon Diesel Tank: Best for Toolbox Integration
The RDS Manufacturing 50 Gallon Diesel Tank is designed for truck bed use, specifically to fit alongside a cross-bed toolbox. Its L-shape cradles the wheel well and leaves room for tools. The tank comes with a 12-volt pump, making it convenient for refueling equipment. Owner feedback appreciates the space-saving design and the pump’s reliability.
However, this tank is not a direct replacement for the factory fuel system; it is an auxiliary tank. Installation involves drilling holes for mounting and running wiring for the pump. Some owners reported that the powder coat can chip over time. This is a good option for those who need both storage and extra fuel, but not for those seeking a smooth OEM-style upgrade.
- L-shaped design allows simultaneous use with a cross-bed toolbox
- 12-gauge steel with powder coat finish
- Includes 12-volt pump, nozzle, and hose
Pros: Maximizes bed space when used with toolbox; Complete pump system included for easy dispensing
Cons: Installation requires drilling into the bed; Not a direct OEM replacement
5. Aero Tanks 58 Gallon Fuel Tank: Best Lightweight Option
The Aero Tanks 58 Gallon Fuel Tank is a lightweight aluminum option for dually trucks. Its 58-gallon capacity adds significant range without the weight penalty of steel. Owner feedback highlights the ease of handling during installation due to its light weight. The tank is designed to fit specific dually configurations, and many users report a good fit.
On the downside, the aluminum gauge is thinner than some competitors, making it more prone to dents from road debris. Additionally, fitment is limited to dually trucks; standard bed models may require modifications. For dually owners prioritizing weight savings, this is a strong choice, but others may find the fitment restrictive.
- Aluminum construction saves weight over steel
- Designed for dually trucks with specific bed dimensions
- Includes sending unit and installation hardware
Pros: Lightweight at approximately 50 pounds; Corrosion-resistant aluminum
Cons: Fitment issues reported on non-dually models; Thinner gauge may dent more easily
6. Northern Tool + Equipment 40 Gallon Diesel Fuel Tank: Best Budget Pick
The Northern Tool + Equipment 40 Gallon Diesel Fuel Tank is a budget-friendly auxiliary tank for truck bed use. It is a simple rectangular steel tank with a pump, suitable for refueling equipment or occasional long trips. Owner feedback notes that it is a good value for the price and that the pump works reliably.
However, this tank lacks a sending unit, meaning you cannot monitor fuel level from the cab. You must either use a dipstick or install an aftermarket gauge. The steel construction is durable but can rust if the paint chips. This tank is best for users who need a simple, low-cost solution and don’t mind manual fuel monitoring.
- Economical 40-gallon capacity for occasional use
- Heavy-duty steel with red powder coat finish
- Includes 12-volt pump, nozzle, and hose
Pros: Very affordable price point; Pump included for easy dispensing
Cons: No sending unit for fuel level monitoring; Requires manual measurement or external gauge
7. LMC Truck 50 Gallon Diesel Fuel Tank: Best Classic Truck Fit
The LMC Truck 50 Gallon Diesel Fuel Tank is a niche product for classic GM square-body trucks. It replaces the original tank, offering modern capacity for older rigs. Owner feedback from restoration enthusiasts indicates that it fits well when the truck’s frame is straight and original. The steel construction and included sending unit make it a convenient upgrade.
However, due to the age and variation of these trucks, some owners have reported needing to adjust mounting brackets or modify the filler neck. The tank is also not compatible with later model trucks. For classic truck owners, this is a solid option, but for modern trucks, it is not applicable.
- Direct fit for classic square-body GM trucks (C10, K10, etc.)
- Steel construction with OEM-style mounting
- Includes sending unit and filler neck
Pros: Specifically designed for classic trucks; Restores range to older vehicles
Cons: Limited to certain vintage models; Some reports of fitment variance due to age of vehicle
Frequently Asked Questions
What size diesel tank should I get for my truck?
The right size depends on your typical driving range and payload capacity. A 30-50 gallon replacement tank works well for daily towing, while 60+ gallon tanks are better for long-haul travel. Remember that full tanks add significant weight, which reduces payload. We recommend matching tank capacity to your average trip length and considering your truck’s GVWR.
Is it safe to install a larger diesel tank?
Yes, when properly installed and compliant with DOT regulations. Most replacement tanks are designed to meet OEM safety standards, including internal baffles to control fuel slosh and solid mounting systems. Ensure the tank is securely fastened and that all fuel lines are properly routed away from heat sources. Some states have restrictions on auxiliary tanks, so check local laws.
Can I install a diesel tank myself?
Many replacement tanks are designed for DIY installation with basic tools. However, the complexity varies. Direct-fit tanks that replace the factory unit typically require jacking the truck, disconnecting fuel lines, and transferring the sending unit. Auxiliary bed tanks are simpler but require drilling and wiring. We recommend professional installation if you are not comfortable with fuel system work.
What materials are best for diesel tanks?
Aluminum is lightweight and corrosion-resistant but more expensive and prone to denting. Steel is durable and less expensive but heavier and can rust if the coating is damaged. Polyethylene (plastic) is lightweight, corrosion-proof, and impact-resistant, but may degrade over time from UV exposure and can be harder to repair. Your choice depends on budget and usage.
Will a larger tank affect my truck's warranty?
Replacing the fuel tank with an aftermarket unit may void the factory warranty on the fuel system, but the Magnuson-Moss Warranty Act protects consumers if the aftermarket part does not cause the failure. To be safe, check with your dealer and consider using a tank that is CARB-approved and meets OEM specifications. Some brands offer tanks that are explicitly warranty-friendly.
Our Verdict
After comparing specifications, safety standards, and owner feedback, our top pick is the Transfer Flow 50 Gallon Replacement Fuel Tank for its smooth OEM fit, durable aluminum construction, and excellent owner satisfaction. For those needing more capacity, the S&B Filters 60 Gallon Fuel Tank is a strong runner-up, offering a massive range with a lightweight, corrosion-proof design.
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