Quote Originally Posted by opulant View Post
Don't do it often.... unless you don't mind the repair bill.

In your fuel tank, there is an important device called fuel pump, which sends the fuel from the tank to the engine. The fuel pump relies on the petrol in the tank to keep it cool and lubricated. Running the car with a low tank means that the pump isnít staying as lubricated as it should and is at risk of overheating. The obvious downside is premature failure of the pump.

Fuel pump is pretty expensive to repair, let alone replace.
I do it only for the first full tank on all my cars. For my Altis, it was the initial lit up of the low fuel signal. For the Ioniq, since it has a mileage count down...

By the way, the top up was 42.3L with 2.7L remaining at 0km