I've been running the new tune for a few weeks now I like it and am looking forward to the better weather and getting my data logs sent in. I've got a question have you guys dyno'ed top tier fuel vs lower grade fuel? I never even Heard of this until last night I looked it up. When I first got my new tune I had 93 shell in it. Switched over to speedway and my mpg have fallen off from 19.7 to 17.4 and idle ruffer. Needless to say I'm going back to shell or BP what do you guys run?
Shell 93