What does the E and F on the fuel tank represent?

[McRyder]

E and F represent the volume of the car's fuel tank. On the fuel gauge of the car's dashboard, the characters E and F are used. F stands for full, and E stands for empty. If the fuel gauge needle is at the F position, it means the car's fuel tank is full. If the fuel gauge needle is at the E position, it means the fuel tank is almost empty. When the car is low on fuel, a warning light will illuminate on the dashboard. The fuel warning light is usually shaped like a fuel tank. When fuel is low, the warning light will turn yellow; in cases of extremely low fuel, the warning light will turn red. Some car models only display a yellow fuel warning light, in which case the owner should pay attention to the remaining fuel level and refuel in time. During the refueling process, it is not advisable to fill the car's fuel tank to the brim, especially in hot summer weather. This is because gasoline expands and evaporates into vapor under high temperatures, and the resulting vapor or even liquid can enter the carbon canister for storage. Overfilling the tank can cause deviations in the fuel gauge needle. Even after prolonged use, the fuel gauge needle may not drop and will only return to normal after some time. Effects of low fuel levels: Fuel sloshing causing the car to stall: When the fuel level is too low, on bumpy or winding roads, the fuel can slosh around, and the fuel pump may not be able to pump fuel in time. This can lead to insufficient fuel supply, causing the car to experience jerking, hesitation, or stalling. Fuel pump overheating: The fuel pump is cooled by the fuel. If the fuel level is too low, the cooling performance of the fuel pump decreases, accelerating wear on internal components and potentially leading to short circuits or burnout. Clogging the fuel system: The bottom of the fuel tank contains more impurities. If the fuel level is too low, these impurities can enter the fuel supply system due to fuel sloshing, leading to clogged fuel lines. Affecting driving safety: Low fuel levels can easily cause the car to stall. If the car stalls while driving, both steering and braking can be affected. If there is heavy traffic on the road, this can lead to traffic accidents.