I <3 knock sensor. For now until I can learn more I'm not fucking with it. I assumed it was like race gas. I know in the past I've mixed in racegas and when racing it worked out better.
For Daily and some racing 93 octane works more then efficent. But I was thinking of more of a buffer. I did not relize there was so many changes to switch fuel types. If I do anythng I will go 100% e85.