I've been data logging with my HP Tuners. I'm seeing 6*-9* of timing pulled for knock retard in 4th and 5th gear. I'm quite frankly scared to get on it now. I don't like running any KR in my tune. I never did datalog my C6 when it was stock, so I have no idea what that car was doing. It seems wrong to have that much timing pulled for KR. It's really hard not to just tune it. I would like to keep my warranty though. I was thinking of swapping to a 7 heat range plug and putting a can of Torco in it to see if that clears anything up.
This morning:
In 1st, 2nd, and 3rd it was 23* of timing. In 4th it was 16* with the 6* pulled out of it.