What Is a Toyota Land Cruiser With a Sub Tank?
Some Toyota Land Cruiser models come equipped with a sub-tank, also called an auxiliary fuel tank. This feature adds extra fuel storage to extend the vehicle’s range, making it ideal for off-road travel, overlanding, or driving in areas with few fuel stations.
What a Sub Tank Does
A sub-tank is a secondary fuel tank installed in addition to the main fuel tank. It stores extra fuel that can be transferred to the main tank when needed. The engine always draws fuel from the main tank, so the sub tank works as a reserve supply rather than feeding the engine directly.
How It Works
The sub tank is filled separately or through a shared filler system. When the main tank gets low, the driver activates a transfer pump using a switch inside the vehicle. This pump moves fuel from the sub-tank into the main tank. Some models have a dedicated gauge or dashboard indicator to show sub-tank fuel levels.
Benefits of a Sub Tank
- Extended Range – Travel longer distances without stopping for fuel.
- Off-Road Convenience – Maintain a backup supply in remote areas.
- Fuel Management – Store fuel separately to balance weight or carry different grades when needed.
Common Models With a Sub Tank
The sub-tank feature is often found on Land Cruiser 70 Series, 80 Series, and some 100 Series models, especially in markets where long-range capability is important.
Maintenance Tips
- Inspect the tank, pump, and fuel lines for leaks.
- Run the pump periodically to keep it in working order.
- Keep fuel fresh to avoid contamination or clogging.
A Toyota Land Cruiser with a sub tank offers extra security and flexibility for long trips and challenging environments. By understanding its function and maintaining it properly, you can make the most of this valuable feature.