In the past couple weeks my 06 STI I've noticed when I fill my tank all the way up that it will only hold ten gallons and that's all, and only three quarters tank period... I called and talked to the dealer and they said that the problem may be in the filler neck or something with the valving in the filler neck?? Figured that I'd post and ask here and see if the problem I'm seeming to be having here is something someone else has had, or having or heard of?? I'm just stumped cause I remember when empty I could put round 14 gallons in and as said above now only 10 and off a tank now with only ten gallons I'm only averaging bout 225 to 250 miles a tank... Any ideas please let me know??