Figured out what the problem was.
To make a long story short, it appears that the seal between the metal filler pipe and the tank has gone bad, far less serious then I originally anticipated. Long as I don't overfill the tank again it should be fine. Worst case: I take it back, have them drain the tank and replace the seal. Not cheap -- about $120 or so -- but not horrible either.
The weird thing was that the mechanic -- the person with a vested interest in selling me unnecessary repairs -- actually made the problem out to be LESS serious then it probably is, and said no repair at all was necessary.
Just overall a very weird situation, but at least alls' well that ended well.
The weird thing was that the mechanic -- the person with a vested interest in selling me unnecessary repairs -- actually made the problem out to be LESS serious then it probably is, and said no repair at all was necessary.
Just overall a very weird situation, but at least alls' well that ended well.