Discover the best 30 gallon (and nearby capacities) fuel cell options to fit a wide range of applications, from street cars to off-road racers. This guide highlights five reliable choices that balance capacity, durability, and practicality. Best for: off-road enthusiasts seeking large-volume auxiliary tanks, street racers needing steady fuel supply, and builders who want straightforward installation.
| Product | Capacity | Brand | Why it’s a fit |
|---|---|---|---|
| RDS MFG INC Auxiliary Fuel Tank | 37 Gal | RDS MFG INC | Largest among selections; good for extended runs and heavy usage. |
| Better Built Steel Transfer Fuel Tank | 36 Gal | Better Built | Strong build with auto shutoff and anti-slosh features for transport. |
| EVIL ENERGY 20 Gallon Fuel Cell | 20 Gal | EVIL ENERGY | Aluminum construction with level sensor; compact option for tighter spaces. |
| EVIL ENERGY 19 Gallon Fuel Cell | 19 Gal | EVIL ENERGY | Smaller footprint with level sender for precise fuel monitoring. |
| GSTP Universal 20 Gallon Fuel Cell | 20 Gal | GSTP | Universal fit with anti-sloshing foam for steady supply. |
RDS MFG INC Auxiliary Fuel Tank 37Gal – 71804
The RDS MFG INC 37-gallon auxiliary tank provides a high-capacity option for extended range. It supports gasoline fueling via an electric pump and is designed as a motor engine fuel tank. Best for long trips or heavy-duty applications where fewer stops are desired. Caution: verify compatible tank mounting and fuel pump compatibility with your system.
Better Built Steel Transfer Fuel Tank – 36-Gallon
Better Built’s 36-gallon transfer tank emphasizes strength with built-in baffles to prevent shifting during transport. It also includes an overfill restriction for automatic shutoff, reducing spill risk. Best for vehicles that carry heavy loads or during frequent stops and starts. Limitation: larger size may require more mounting space and specific mounting hardware.
EVIL ENERGY 20 Gallon Fuel Cell with Level Sender
EVIL ENERGY’s 20-gallon aluminum fuel cell includes a built-in 3–90 ohm level sensor and anti-slosh foam. It’s ideal for users needing reliable fuel level monitoring in a compact form factor. Best for smaller builds or when space is constrained. Caution: not suitable for E85 gasoline in some fuel line configurations.
Parts-Diyer 20 Gallon Aluminum Fuel Cell
Parts-Diyer offers a 20-gallon aluminum fuel cell with dual -10 outlets and a quick-release cap. It includes an oil level sensor and anti-slosh foam. Best for installations requiring dual outlets or easy access through a quick-release cap. Limitation: data notes compatibility with certain fuel line configurations, so confirm fit for your setup.
Buying Guide
What capacity should I choose?
Prime considerations include your typical driving range, use case (street, track, off-road), and space constraints. A 30- to 37-gallon tank is ideal for long trips or race setups. If space is limited, 19–20 gallon options offer a balance of capacity and fitment.
Aluminum vs steel
Aluminum tanks are lighter and resistant to corrosion, making them common for performance builds. Steel tanks offer durability and robust mounting, often at a higher weight. Choose based on vehicle weight balance and installation ease.
Fuel compatibility and sensors
Some tanks include built-in level sensors and anti-slosh foam, which improve monitoring and fuel delivery consistency. Verify compatibility with your chosen fuel types (gasoline, diesel, or alternative blends) and your fuel line fittings (AN sizes like 8AN or 10AN).
Installation considerations
Check mounting space, available mounting tabs, and the need for additional hardware. Tanks with integrated fittings simplify installation, but larger capacities may require custom brackets or modifications.
Safety and spill prevention
Overfill protection, venting, and anti-slosh features reduce spill risk during fueling and operation. For larger tanks, ensure proper routing of vent lines and avoid areas prone to heat and impact.
Compatibility with your application
Street cars, off-road builds, and race vehicles have different demands. A tank with higher capacity and anti-slosh foam can be advantageous for endurance use, while compact tanks suit tight engine bays or showroom builds.
Maintenance and longevity
Choose tanks with durable caps, corrosion-resistant surfaces, and easy-to-clean interiors. Periodically inspect fittings, seals, and level sensors for reliability.
FAQ
- What is the typical best use for a 37-gallon tank? Best for long trips, heavy-duty use, or racing setups requiring extended fuel range.
- Are aluminum tanks lighter than steel? Yes, aluminum tanks are generally lighter and resist corrosion, aiding handling and efficiency.
- Do these tanks require special mounting hardware? Some do; verify mounting tabs and bracket compatibility with your vehicle.
- Can I use these tanks with E85 or other fuels? Fuel compatibility varies by model; check each product’s limitations and line fittings to ensure safety.
- Do all tanks include level sensors? Several listed options include level sensors, but not all. Confirm sensor availability in the product specs.
- Is anti-slosh foam important? Anti-slosh foam helps maintain fuel supply during aggressive driving and reduces fuel movement inside the tank.