The gas nozzle in the gas tank, that is!
I haven't seen an explanation for that metal "bar" that sits across the inside of the tank, preventing the nozzle from going all the way in. What is that??? I wish it wasn't there since it makes filling an adventure, especially with the nozzles with the sleeves on them.
I am able to work around it (although I did give the tank a bit of a gas bath today), but just wondering what the heck that thing is and does!