since i got a new computer for my car, after the old one stuffed up, the fuel usage seems to have gone up about .5 - 1 litre per 100km when cruising at 100km/h. even though my old chip was put into the new computer, and it is a brand new remanafactured computer.
Well if your old memcal is in it, then it's nothing to do with the new computer, it's another issue or the fuel is craper or something