An auxiliary gas tank is a secondary fuel tank designed to extend driving range or offer fuel redundancy. This feature is typically found in vehicles intended for off-road travel, heavy-duty use, or long-distance driving.
Vehicles That Commonly Feature Auxiliary Tanks
Toyota Land Cruiser (Select Models)
- 70 Series, 80 Series, and some 100 Series models
- Dual-tank systems include a main and sub tank with in-cabin transfer controls
- Most common in Australian, African, and Middle Eastern markets
Full-Size Pickup Trucks
- Older Ford F-Series, Chevrolet, and Dodge trucks
- Some configurations include a rear and side-mounted tank
- Popular with ranchers, contractors, and fleet operations
Commercial Vans & Box Trucks
- Many delivery and utility vehicles include optional or aftermarket auxiliary tanks
- Used to minimize fuel stops over long service routes
Motorhomes & RVs
- Larger RVs often include dual-tank systems or extended single tanks
- Designed to support extended travel without frequent refueling
Benefits of an Auxiliary Gas Tank
- Increases fuel range by 30 to 50 percent or more
- Adds redundancy for remote or off-grid travel
- Improves fuel logistics for long hauls and expeditions