When you fill up your 50-liter tank, it shows you’ve added 55 liters?Why is that?

According to the Municipal Market Supervision Bureau, many people often encounter some small questions: clearly the fuel tank is only 50 liters, when filling up the tank, but it shows that 55 liters have been added?Why is the actual refueling capacity larger than the rated capacity?How to deal with refueling disputes?↓ Why is the actual… Read more When you fill up your 50-liter tank, it shows you’ve added 55 liters?Why is that?