Question for oil and gas experts – especially pumps at the gas (petrol) stations
I saw this at a gas station yesterday. (no Premium available). If I understand how the different levels (of octane) work at gas stations, they really have only two underground tanks – the trucks pour is the highest level and the lowest level. And when you buy any middle level, the pump simply mixes the two in the proper ratio. This certainly simplifies inventory management and logistics. If that is correct, theoretically, you can never run out of Premium (highest level) without running out of all levels other than the lowest level.
Is that understanding correct? If so, how do you explain the picture?