I am used to the octane indicator sitting pretty static at 100% all the time. Today it showed me a new trick I don't understand. I got on the interstate, an set up cruise at 72 MPH. I looked over at my gauge display when I could and noticed a reading of 107%. It stayed there till I took my exit and next time I could look it was back to 100% again. On the reverse leg of the ride, I looked for a similar reading...nope it stayed at 100% all the way home. Guess I haven't figured out what it's telling me as yet. Any suggestions?