The fuel tank of large aircraft can hold more than ten tons of oil, but generally, it does not need to be filled too full. It only needs to be guaranteed to be 1.5 times the one-way fuel consumption, otherwise there is likely to be an accident.
According to the truth, different aircraft fuel tanks are different, so the oil loading capacity is also very different. Large civil airliners can load more than ten tons of oil at most.
In the civil aviation regulations, the refueling volume of aircraft must be 1.5 times that of one-way fuel consumption. Therefore, even for ordinary passenger aircraft, the fuel volume in the fuel tank must maintain 1.5 times that of a single trip.
Similar to B737-800 aircraft, the fuel consumption per hour is 2650kg, and the maximum fuel load is about 22000kg. However, generally, it will not be filled up. This practice is not safe, and there is likely to be an accident during landing. Therefore, it is only necessary to ensure that it can land at the destination airport.