I've run Sunoco with good results. Its not oxygenated like the VP and requires some attention. I'm experimenting with Klotz additive and 93 pump gas. At 12.5 no problems and it will be cheaper than Sunoco or VP. No bad plug coatings. It lasts indefinitely in the metal can. There may be a few HP with the race gas but I'm just running an index.
http://apkgroup.com/msds/english/MSDS%20by%20Supplier/Winner%27s%20Circle%20(Klotz%20Synthetics)%20(WNC)/KL602(05-08-2017).pdf
Hopefully it has iso-octane (reference fuel of 100 RON/MON) and not n-octane (-17 MON, -20 RON).
https://en.wikipedia.org/wiki/Octane_rating
