I would say I have a fair amount of experience at works and doesn’t work in competitive bracket racing. If you want to put pump gas in your bracket car, have at it. While I’m certain it has enough octane to run his engine, it will never be as consistent.
This ties into my last post nicely. If your program demands consistency in your fuel supply, regardless of whether you're running 15:1 or 11:1 CR, that's going to have to come from buying a known product at a premium price compared to the latest tanker truck's load of fuel that ended up in the Sunoco or Shell station at the local shopping center.
I don't have to worry about it, but recognize it can be a requirement for others.
