Dude that's an insane fuel usage!!! Unless your running in a new motor or you drive a 1/4 mile at a time...? Is your car stock? I have the tunehouse stage3 kit: PW intercooler & piping, 4" dump + full zorst, modded turbo + wastegate, injectors, PW surgetank, cold air box etc. My latest L/100K'S was 8.4 on a trip at the easter holiday from sydney to port macquarie and back with 3 adults + luggage and 4 cartons of beer!.... This was on the "street tune" wich is about 370 - 375rwkw, 90-110kph most of the way, but I dont think the 400rwkw tune would be much different on the open road... Back in the city this has gone up to 11.7 with some fast takeoffs from the lights but mostly pussyfooting around. I expect this will go back up to about 14.7 - 15L/100K'S in time. Still not so bad considering the grunt this thing has. PS mine is the zf auto