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A 20-gallon auxiliary fuel tank is a game-changer for truck owners needing extra fuel capacity without the bulk of larger systems. Designed to complement your truck’s primary tank, this mid-sized solution strikes a balance between extended range and practical installation, ideal for long-haul drivers, off-road adventurers, and fleet operators.
Why Choose a 20-Gallon Auxiliary Tank?
- Extended Range: Add 200–500 miles of driving distance (depending on fuel efficiency), reducing stops in remote areas or on lengthy routes.
- Space-Efficient Design: Compact enough to fit under beds, in toolboxes, or alongside existing chassis components without major modifications.
- Versatile Fuel Transfer: Many models include electric transfer pumps for seamless fuel shifting to the main tank while driving.
- Durability: Built from corrosion-resistant aluminum or polyethylene to withstand road debris, weather, and diesel exposure.
Key Features to Prioritize
- DOT Compliance: Ensure tanks meet Department of Transportation safety standards for secure road use.
- Venting System: Opt for automatic venting to prevent pressure buildup and leaks.
- Easy-Read Gauges: Monitor fuel levels at a glance with integrated or remote gauge options.
- Universal Mounting: Look for bolt-on kits compatible with popular truck models (Ford, Chevy, RAM, etc.).
Installation & Maintenance
- Professional Setup: While some tanks are DIY-friendly, complex installations may require expert help to ensure proper plumbing and electrical connections.
- Leak Checks: Inspect fittings, hoses, and seals regularly, especially after off-road trips.
- Winter Readiness: Use anti-gel additives in cold climates to keep diesel flowing smoothly between tanks.
Ideal Applications
- Overlanding rigs exploring off-grid destinations.
- Hotshot trucking fleets minimizing downtime.
- Agricultural or construction trucks operating far from fuel stations.
Drawbacks: Adds 120–160 lbs when full, slightly impacting payload capacity. However, the trade-off in convenience and efficiency is often worthwhile.
A 20-gallon auxiliary fuel tank is more than an upgrade—it’s a reliability booster for truckers who refuse to let fuel limits dictate their journey. Whether tackling highways or backcountry trails, this tank keeps you moving farther, safer, and smarter.