What does F mean on a car?

[Tony]

F on a car usually indicates the fuel level, with the highest mark on the fuel gauge represented by F, meaning the fuel in the tank has reached the maximum optimal level. Below is more information about car fuel tanks: 1. Fuel gauge meaning: The fuel gauge on the dashboard has 5-6 marks, each representing the remaining fuel capacity in the tank. Generally, when the fuel gauge shows two marks left, it's time to refuel. 2. Fuel tank capacity measurement unit: The international standard uses L (liters) as the unit for measuring car fuel tank capacity, with different countries having their own standards for fuel tank capacity. 3. Relationship between engine displacement and fuel tank volume: Generally, small cars have a fuel tank capacity of 35-45 liters, while mid-size cars have a capacity of about 55-75 liters. A full tank usually allows for a driving range of about 500 kilometers. Depending on the car's displacement, lighter cars with smaller displacements have correspondingly smaller fuel tank volumes, while heavier cars with larger displacements have larger fuel tank volumes.