I'm baffled, and I know others are just as puzzled. It can't just be the volume of air bubbles created while fillling. Nor can it possibly be evaporating that fast, nor is the fuel going out an overflow outlet. Yet when you fill your tank to very top of the rim of the tank the fuel level drops back down below the rim. I've stood there for a good five minutes repeatedly filling and watching the level drop down again. So where does all the fuel go? Do we all have Tardis tanks? Well, everyone, except Sobil.