ive been using boost98 and notice a much smoother engine and drive. have to say i was quite concerned about the 10%ethonol but did a shit load of research and could find a major thing to be worried about. i did make sure i filled up with a full tank first go though and the ethonol blends with water that may be sitting at the bottom of your tank (this does happen) from moisture.
second tank through. much more impressed. did 510km country driving with just under half tank left, 4L V8 economy.... i was impressed.... not sure weather it was the fuel of ECU reset but it fogged factory specs. done it twice now.