have been reading some of the topics here about fuel so I thought I would ask a question. when you say you have had your car tuned to run on 98 fuel whos is it that tunes to this, as I have been to my local ford dealer and he has put the laptop computer on to the car and there is no fuel option. as when I run 98 the ute idles up and down, and tacho goes to red line before going into limp mode. so I am trying to find out why other xr owners can run this fuel when I cant. somebody mentioned that you can disconnect the battery to start with the new fuel.