What Is a Sub Gas Tank and Why Is It Useful?
Understanding a Sub-Gas Tank
A sub-gas tank, also known as an auxiliary fuel tank, is an additional fuel storage unit installed alongside the vehicle’s main fuel tank. It is typically connected to the fuel system so it can supply fuel directly to the engine or transfer fuel to the main tank.
These tanks are common in off-road vehicles, long-haul trucks, RVs, and expedition setups where extended range and fuel security are important.
Key Benefits of a Sub-Gas Tank
Extended Driving Range
A sub-gas tank increases the total amount of fuel you can carry, allowing for longer distances between refueling stops. This is especially valuable when traveling in remote areas where gas stations are scarce.
Redundancy and Safety
Having two tanks provides a backup fuel source. If the main tank or its pump fails, the vehicle can still run on fuel from the sub tank.
Convenience for Specific Activities
- Off-road adventures – Enables exploration without worrying about running out of fuel far from civilization.
- Towing and hauling – Supports the higher fuel consumption of heavy loads
- Travel in remote regions – Reduces the need to carry unsafe jerry cans or repeatedly detour for refueling