It all depends, my auto ute, not much crap in the back too often, around town 595-610km per 70 lts on the highway, say a run to coffs and back from newcastle 740-780 km per tank. on my xede I have amap that runs the car reasonably lean between the revs of 1800 and 2600 and 10-30% throttle opening, lower boost to, still 7 psi but not 11psi like the rest. this allows the car to have a AFR of around 13.9:1 when cruising, factory it was 10.2:1, so I save about 35% fuel, if I put my foot down to overtake, the tune is set to add fuel allong with boost as revs rise, its AFR return to 12:1 nice and safe. Tthis works a treat with the xede causer I can flick the switch and have 290rwkw or run my in town tune(also my wet weather and wife tune) and have 245 rwkw and great economy. I am sure you could do it with the flasher, just a pain to upload a high output tune if you want to show a Expensive Daewoo driver a clean set of heals. Have fun. <{POST_SNAPBACK}> Ive just moved from a AUII XR8, to a XR6T MKII. From the above figures they seem fine as even the AU would not get these and certainly wasn't as much fun as turb!