Does the fuel tank have a safe capacity?

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The fuel tank has a safe capacity. The safe capacity of the fuel tank is mainly designed to leave a certain space between the safe limit and the tank opening, preventing the fuel from expanding and overflowing when the temperature rises. Generally, the safe capacity is 95% of the actual capacity. Nowadays, car fuel gauges come in two types: analog and digital. The analog type indicates the fuel level through the position of a pointer. The gauge is marked with two letters, E and F, where F stands for full and E for empty. When the fuel icon lights up, it means the remaining fuel is low and needs to be refueled as soon as possible. The digital fuel gauge displays the remaining fuel through the number of illuminated bars. More illuminated bars indicate sufficient fuel, while 1 to 2 bars mean the fuel level is low and needs to be replenished promptly. The digital fuel gauge also shows the estimated range, but this can only serve as a reference. It is calculated by the onboard computer based on average fuel consumption and the remaining fuel in the tank. Actual driving habits, road conditions, vehicle load, and other factors will affect the actual range.