My 4x4 is a healthy stage 1 running 1 bar of boost , anyway, not long after i bought it i fancied seeing just how many miles it would actually do to a tank of fuel, so i filled it up with 97 RON , zeroed the trip counter and ran it off boost, but at sensible road speeds till it was half full then filled her up again. I did this 4 times to average out the miles done and fuel used....... The result was just short of 400 miles to a tank They use to say that stage 1 cossies returned better fuel economy than standard cars even though they were considerably quicker. There may be something in that statement after all