Vehicles equipped with two gas tanks are designed for extended driving range, reduced refueling stops, and improved fuel management. Dual-tank systems are commonly found in trucks, SUVs, and specialty vehicles built for long-distance travel or commercial use.
Common Types of Vehicles With Two Fuel Tanks
Pickup Trucks
- Older full-size pickup trucks, especially heavy-duty models from Ford, Chevrolet, and Dodge, often included a rear and side-mounted tank.
- Examples include the Ford F-150, F-250, and F-350 models from the 1970s through early 1990s
- Select modern work trucks may include optional dual-tank systems for fleet and utility applications.
Toyota Land Cruiser
- Some Land Cruiser models, such as the 70 Series, 80 Series, and select 100 Series, offered dual fuel tanks for overland and remote travel
- These setups were typically standard in expedition and commercial variants outside North America
Commercial Vehicles
- Delivery trucks, box trucks, and flatbeds often have two tanks to support longer routes.
- Common in long-haul diesel trucks and vocational vehicles with high fuel demands
Motorhomes & RVs
- Many Class A and Class C motorhomes include dual fuel tanks or expanded tanks to support extended travel without needing to refuel frequently.
Military & Specialty 4x4s
- Tactical and expedition vehicles, including older HMMWVs, modified Jeeps, and global 4×4 utility platforms, often use dual-tank systems to maintain fuel supply in remote operations.
How Dual-Tank Systems Work
- The system includes a main tank and a sub-tank
- Fuel is transferred via a switch or automatic control
- A shared gauge may show levels for both tanks, or each tank may have its indicator
- Benefits include better weight distribution, backup fuel storage, and longer operational range