The Reason You Shouldn't Drive on Empty

Allowing your fuel gauge to hit the red zone or letting the warning light come on isn't just about the risk of stalling in the middle of the road—it’s actually damaging your car in the long run. Here’s why:

1. Risk of Fuel Pump Failure 
In most vehicles, fuel acts as both a coolant and a lubricant for the fuel pump (often called the "pump-tick" in Thailand). When fuel levels are too low, the pump starts drawing in air instead of liquid, causing heat to build up. This can lead to the pump motor burning out or wearing down much faster than usual.

2. Sediment at the Bottom is the Villain 
Over time, debris and dirt naturally settle at the bottom of the fuel tank. If you run your tank until it's bone dry, the pump is forced to suck up this sediment. This can lead to a clogged fuel filter or cause significant damage to your fuel injection system.

3. Air Trapped in the Fuel System 
Letting your fuel run out until the engine stalls can introduce air into the fuel lines. In certain vehicles—especially those with diesel engines—you may need to "bleed" the air out of the system entirely before the car will start again, which can be a real headache.

4. Safety and Emergencies 
You never know when you’ll hit heavy traffic or face an unexpected emergency that requires a sudden trip. Keeping at least 1/4 of a tank as a reserve ensures you are ready for any situation without the added stress of "range anxiety."