What could be the reason for the smell of gasoline in the car?

There are many reasons for the smell of gasoline in the car. The oil supply pipeline is damaged, or the gasoline filter is faulty. Some cars are equipped with carbon tanks, haven't they been changed for a long time? In addition, the working condition of the engine will also make the car smell of gasoline. If a cylinder doesn't work or burns insufficiently, it will also have a strong smell of raw gasoline. After the air conditioner is turned on, the air inside the car begins to circulate, and part of the gasoline smell is filtered by the air conditioner or circulated to the outside of the car.