If you have access to non ethanol fuel that’s what you want. Yes, ethanol is the oxygenator. I do not have access to it here in the San Fran Bay Area so I run a 50/50 blend of 100 octane low lead avgas (non eth) and 91 octane pump premium (10% ethanol). Works great for me and smells great! If you like the smell of leaded airplane exhaust that is lol.
Stay away from ethanol gas in these high performance machines. It burns hotter and dryer than 91 octane gas. It can melt down an engine if run to much of it. Also I am not sure about what it does to plastic as 80 per ethanol is really hard on plastic. Its an excellent cleaner to. Have had trouble with oxygen sensors in the past and the dealer though it might be that there is ethanol in the gas up here in North Dakota.