What is the difference between the labeled capacity and actual capacity of a car fuel tank?
1 Answers
The actual capacity of the fuel tank is greater than the labeled capacity. According to fuel safety regulations, the national standard stipulates that the labeled capacity of a car fuel tank is 95% of the rated capacity, so when filled, it may exceed the labeled capacity. During the actual refueling process, the amount of fuel may exceed the calibrated volume. This is because the fuel tank volume calibrated by car manufacturers is measured from the bottom of the tank to the safety limit, and there is still some space from the safety limit to the tank opening. This space is reserved to ensure that the fuel inside the tank can expand when the temperature rises without overflowing the tank's safety space. If the fuel is filled up to the tank opening during refueling, the actual refueling amount may exceed the calibrated tank volume. Maintenance of the fuel tank is as follows: Drain accumulated water and sediment from the tank, and check for any oil leakage at the fuel pipe joints and switches. For fuel tank caps equipped with air valves and steam valves, also check if the vent holes are clear. The filter screen at the fuel filler neck should remain intact to prevent impurities from entering the tank during refueling and clogging the fuel lines. The sealing gasket on the fuel filler cap should also be intact to prevent fuel from spilling out while driving.
