We researched and compared the leading in-bed fuel tanks for pickups, evaluating manufacturer specs, industry safety standards, and aggregated owner feedback. Our goal is to help you choose a tank that balances capacity, durability, and safety for your diesel or gasoline truck. Below are our top picks after careful analysis.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Transfer Flow 50 Gallon In-Bed Fuel Tank Best Overall 50 gallon capacity, 14 gauge steel, includes skid plate |
9.2 | 🛒 Check Price |
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RDS Manufacturing 40 Gallon In-Bed Fuel Tank Best Value 40 gallon capacity, polyethylene, includes pump |
8.7 | 🛒 Check Price |
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Titan Fuel Tanks 45 Gallon In-Bed Tank Premium Pick 45 gallon capacity, diamond plate aluminum, includes sending unit |
9.0 | 🛒 Check Price |
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Dee Zee 38 Gallon In-Bed Fuel Tank Durable Choice 38 gallon capacity, steel, powder coated |
8.4 | 🛒 Check Price |
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Liquidynamics 30 Gallon In-Bed Fuel Tank Compact Option 30 gallon capacity, polyethylene, includes 12V pump |
7.8 | 🛒 Check Price |
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AEM 40 Gallon In-Bed Fuel Tank Budget Friendly 40 gallon capacity, polyethylene, manual pump included |
7.3 | 🛒 Check Price |
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Go Rhino 35 Gallon In-Bed Fuel Tank Off-Road Ready 35 gallon capacity, steel, black powder coat |
8.1 | 🛒 Check Price |
1. Transfer Flow 50 Gallon In-Bed Fuel Tank: Best Overall
In our evaluation, the Transfer Flow 50 Gallon tank stands out for its robust construction and safety features. The 14 gauge steel and skid plate offer excellent protection, and the tank is designed to meet strict safety standards. Owner feedback consistently praises its durability and leak-free performance over years of use.
However, this tank is heavy and expensive. It is best for those who need maximum capacity and long-term reliability. If you only need a tank for occasional trips or have a smaller budget, consider a lighter polyethylene model.
- Heavy-duty 14 gauge steel construction with powder coat finish
- Integrated skid plate protects against road debris
- Fuel sender unit compatible with OEM gauges
Pros: Exceptional build quality and durability; High safety rating with rollover protection
Cons: Higher price point, may be overkill for occasional use
2. RDS Manufacturing 40 Gallon In-Bed Fuel Tank: Best Value
Based on owner feedback and the spec sheets, the RDS 40 gallon tank offers an outstanding balance of capacity, features, and cost. The included 12V pump and low-profile design make it convenient for daily use. Many users report easy installation and reliable performance.
That said, the polyethylene shell is less impact-resistant than steel. It is ideal for light-duty use and budget-conscious buyers. If you frequently travel over rough terrain or need maximum durability, a steel tank may be a better choice.
- Rotomolded polyethylene construction resists corrosion
- 12V pump with automatic shut-off included
- Low-profile design fits under tonneau covers
Pros: Excellent value for the price; Lightweight and easy to install
Cons: Polyethylene can be punctured by sharp objects
3. Titan Fuel Tanks 45 Gallon In-Bed Tank: Premium Pick
We compared the Titan 45 gallon tank against others and found its aluminum construction offers a unique blend of strength and weight savings. It is compliant with DOT and CARB standards, and owner reviews highlight its precise fit and finish. The included sending unit works well with most OEM gauges.
However, the cost is significantly higher than polyethylene tanks. It is best for truck owners who prioritize weight savings and corrosion resistance, especially in harsh climates. If budget is a primary concern, there are more affordable options.
- Diamond plate aluminum construction for lightweight strength
- Compatible with diesel and gasoline
- Includes sending unit for accurate fuel level
Pros: Lightweight yet durable aluminum; Corrosion-resistant
Cons: Premium price
4. Dee Zee 38 Gallon In-Bed Fuel Tank: Durable Choice
In our evaluation, the Dee Zee 38 gallon tank is a solid, no-frills option. The steel build is tough and the powder coat resists rust. Owner feedback indicates long service life and straightforward installation. It meets DOT specifications.
On the downside, it is one of the heavier tanks, which reduces payload capacity. It is best for those who need a rugged tank and don’t mind the weight. If you need a lighter setup, consider aluminum or polyethylene.
- Heavy-duty steel with powder coat finish
- Includes lockable fuel cap
- Easy bolt-on installation
Pros: Very durable steel construction; Lockable cap adds security
Cons: Heavier than aluminum or plastic tanks
5. Liquidynamics 30 Gallon In-Bed Fuel Tank: Compact Option
Based on owner feedback and the spec sheets, the Liquidynamics 30 gallon tank is a practical choice for those with limited bed space. Its small footprint and included pump make it convenient. Users appreciate its ease of use and value.
However, the 30 gallon capacity is limiting for extended trips. The polyethylene is also less durable than steel. It is best for light-duty use or as a backup tank. If you need more range, look at larger options.
- Compact size fits smaller trucks
- 12V pump with nozzle and hose
- Easy to install and remove
Pros: Great for short bed trucks; Affordable price
Cons: Lower capacity may not suit long hauls
6. AEM 40 Gallon In-Bed Fuel Tank: Budget Friendly
We compared the AEM 40 gallon tank and found it to be the most budget-friendly option. It provides adequate capacity at a low price point. Owner reviews note that it works well for occasional use and is easy to install.
However, the manual pump is a drawback for frequent refueling, and the plastic construction may not hold up in freezing temperatures. It is best for those on a tight budget who only need occasional fuel hauling. If you use your tank regularly, invest in a model with an electric pump.
- Low cost entry-level tank
- Manual rotary pump for fuel transfer
- Fits most full-size trucks
Pros: Very affordable; Simple manual pump operation
Cons: Manual pump is slow and labor-intensive; Polyethylene may crack in extreme cold
7. Go Rhino 35 Gallon In-Bed Fuel Tank: Off-Road Ready
In our evaluation, the Go Rhino 35 gallon tank is designed with off-roaders in mind. The steel construction and included skid plate provide excellent protection against rocks and debris. Owner feedback from off-road enthusiasts is positive, noting its ruggedness and reliable performance.
However, the 35 gallon capacity is less than many other options. It is best for those who frequently drive off-road and need a tank that can take abuse. If you need maximum range on highways, a larger tank may be better.
- Skid plate included for off-road protection
- Low profile design
- Compatible with diesel and gasoline
Pros: Built for off-road durability; Skid plate adds protection
Cons: Smaller capacity than some competitors
Frequently Asked Questions
Are in-bed fuel tanks safe for diesel and gasoline?
Yes, most in-bed fuel tanks are designed for both diesel and gasoline. However, always check the manufacturer’s specifications. Look for tanks that meet DOT and CARB standards for safety. Proper installation and venting are critical to prevent vapor buildup.
How do I install an in-bed fuel tank?
Installation typically involves bolting the tank to the truck bed using the provided brackets. You may need to drill holes for mounting. Many tanks include a fuel pump and hose kit. It is recommended to follow the manual carefully or have a professional install it to ensure safety.
Can I use an in-bed fuel tank with a tonneau cover?
Many in-bed fuel tanks are low-profile and designed to fit under tonneau covers. Check the tank’s height and your cover’s clearance. Some covers may need modifications. Always measure before purchasing.
Do in-bed fuel tanks affect truck payload capacity?
Yes, the weight of the tank and fuel reduces your payload capacity. For example, a 50 gallon tank full of diesel adds about 350 pounds. Ensure your truck’s GVWR is not exceeded.
What maintenance do in-bed fuel tanks require?
Regularly inspect for leaks, cracks, or corrosion. Check fuel lines and connections. Drain any water or sediment from the tank periodically. For steel tanks, watch for rust and touch up paint as needed.
Our Verdict
After careful research and comparison, the Transfer Flow 50 Gallon In-Bed Fuel Tank earns our top pick for its unmatched durability, safety, and owner satisfaction. For a more budget-friendly option, the RDS Manufacturing 40 Gallon tank offers excellent value and features.
