Hmm, have never heard of it. I use 100 octane LL AvGas from my airport at around $6 per gallon in my cars, but word of caution. I put this fuel in my survivor 70 W30, ran great initially. However, after a quarter tank of using this fuel must have "cleaned" my fuel system really well and dislodged a lot of crap which made its way into the carb. Took the carb off and it was a mess with so much junk in it. After a quick rebuild runs great now.
I have had great luck mixing 93 pump gas with Klotz octane booster
https://www.amazon.com/Klotz-Higher-...08YEHRUK&psc=1