Hi Guys,
I have a 2004 STI thats been mapped to 340bhp by Andy F, it has been servced every 10k and when I don't hammer the backside of it I can get between 250-280 miles per tank, when it does get a wee bit heat that can be as low as 100, but as previously stated by many - you don't buy and STI, get it mapped to 340bhp if your gonna be worried about how many MPG's you get. If you do worry about such trivial things sell the car and buy a diesel - let someone else enjoy how an Impreza is meant to be driven.
PS, The white 18"s are going on the car this weekend and the pics will be on the forum on Sunday/Monday cannae wait!!!! What a bloody kid I am.