There is also a gas station on route 23 southbound side near butler that sells 100oct at the pump. It's by G&A's if anyone is wondering.
Based on my experience running 100 octane ontop of just meth/93 does give a little more timing increase at 17-18psi, but oddly enough I trapped higher on just 93/meth than 100/meth
here are the two logs
12.3 @ 116.9 dci/procede/chargepipe/do10 93 octane 100% meth
And the 12.4 at 116.1 on 100octane/ 100% meth
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As you can see the overall timing is a little higher, esp 3rd gear on the 100/meth run, however I was have traction issues that day which might have lead to the lower trap/et.