I guess my important question is: I had my car tuned by Steve Kan with sunoco 94 octane. Sunoco is discontinuing the 94 and I just put my first tank of 93 in. How much effect will 1 octane point have?

Also, I asked about a different boost problem I'm having in the 3g section but at either boost setting (.7 or 1.0 bar) my max boost is always about .09 bar higher than the set number. So at .7 it'll max at .79 and 1.0 at 1.09. Could someone direct my troubleshooting a bit? This behavior is constant year round.

I'm thinking with the gas i'm going to be running a retune would be good but I'd like to get that boost problem fixed, along with this one:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/less-obvious-boost-loss-causes-510592/

I'm searching now.