Thought I would add...

It really depends on my driving mood as to how the consumption goes, usually around the 300 mark, fill up as soon as the light comes on.

What car do you have? MY05 WRX
What engine is it? 1994cc
What mods that may affect fuel? TBE, VF34, De-Caps, Verso, 246hp ATH
Whats the transmission, Auto/Manual? AUTO
How many k's do you get to a full tank? 250-450
What fuel do you use? BP 98