I'm also very interested in this...

In the market for an 05 sti and would prefer not to chew up heaps of fuel during the week just cruising to and from work...

Would it be impossible for a stockish 05 sti to be getting around 500kms per tank?

Also, when you guys say verso tune for performance and economy, why don't the cars come like that from factory? Is there a reason why the Sti's run rich from the showroom?