Why Should the Engine Be Turned Off When Refueling?

[KeiraMarie]

There are several reasons why the engine should be turned off when refueling: Gasoline is a flammable substance with volatile properties. When the concentration of gasoline molecules in the air reaches a certain level, even a small spark can potentially cause combustion or an explosion. A vehicle that is not turned off may have sparks at the exhaust pipe or electrical connections, posing a safety risk. Therefore, for safety reasons, all vehicles entering the station for refueling must have their engines turned off during the process. Additionally, the working principle of the fuel pump inside the fuel tank generates heat, increasing the internal pressure. If the engine is not turned off, the fuel pump remains operational, and during refueling, this could lead to the dangerous situation of dense gasoline vapor being expelled.