So ... update.
Refueled with known good fuel from near local drag strip, Sunoco 93 plus a few gallons of 260 GT 100 octane and E85 mixed with ethanol sensor showing 34% ethanol. The difference was amazing...
It actually did nothing. Not a thing. Car runs and drives exactly the same as before. OAR is the same as before.
Matt got back with me on my datalogs, he said, OAR is bad, but no knock at WOT, could be false knock, check knock sensor wires.
I went and checked knock sensor wires and they are fine and intact, no chaffing.
I am not sure what to look for next.