Ok here it is. i recently bought the SCT x3 tuner and am so happy i did! Now, my question is what will be the difference in performance if i go ahead and set my car up for 93 octane? all i have done is a set of flowmaster axlebacks and a drop in K&N filter... Please no smart comments about the filter cuz i'm still batteling the wife for a CAI....Its a warrenty issue...