An auxiliary fuel tank is an additional fuel storage system installed alongside your vehicle’s factory tank. Whether you drive a pickup truck, RV, commercial truck, or off-road vehicle, an auxiliary fuel tank extends your driving range, reduces refueling stops, and provides extra capacity for long trips or work in remote locations.
What Is an Auxiliary Fuel Tank?
An auxiliary fuel tank is a secondary tank designed to store and transfer fuel to the main tank or supply fuel directly to equipment. These tanks are commonly made of aluminum or steel and are designed to be DOT-approved and EPA-compliant for safe transport of gasoline or diesel.
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Key Benefits of an Auxiliary Fuel Tank
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Extended Range: Carry more fuel to travel further without frequent stops.
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Time Savings: Especially valuable for commercial fleets, long-haul drivers, and RV owners.
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Versatility: Can store diesel, gasoline, or aviation fuel depending on tank certification.
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Safety: Built with spill-proof caps, rollover valves, and venting systems to meet strict standards.
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Convenience: Often integrates with in-cab controls and fuel transfer pumps.
Types of Auxiliary Fuel Tanks
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In-Bed Auxiliary Fuel Tanks – Installed in pickup beds; popular sizes include 30-gallon, 50-gallon, and 100-gallon tanks.
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Combination Auxiliary Fuel Tank and Toolbox – Offers secure storage plus extra fuel capacity.
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Gravity Feed Auxiliary Fuel Tanks – Transfer fuel automatically into the main tank.
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Pump-Equipped Auxiliary Fuel Tanks – Allow manual transfer to vehicles, boats, or equipment on-site.
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Choosing the Right Auxiliary Fuel Tank
When selecting an auxiliary fuel tank, consider:
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Capacity: Match the tank size to your vehicle’s range and payload limits.
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Material: Aluminum tanks are lightweight and corrosion-resistant; steel tanks offer rugged durability.
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Compliance: Look for DOT-approved and EPA-compliant labeling.
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Features: Built-in pumps, hoses, and gauges improve usability.
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Installation: Ensure the tank fits your truck bed dimensions and is installed securely.
Safety and Maintenance Tips
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Always follow manufacturer installation instructions or use a certified installer.
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Regularly inspect hoses, valves, and fittings for leaks or wear.
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Label the tank clearly to indicate the type of fuel stored.
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Follow all local, state, and federal regulations for transport and use.
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Conclusion
An auxiliary fuel tank is a smart investment for anyone who needs more fuel capacity, fewer stops, and better operational efficiency. From diesel auxiliary fuel tanks for trucks to combination fuel tank/toolboxes, today’s designs offer safe, compliant, and user-friendly solutions for both personal and commercial applications. By selecting the right size, material, and features, you can significantly extend your range and improve your fueling convenience.