I have used many gallons of non-ethanol 92 octane and do not think anymore is necessary, I see no advantage, our local Stihl dealers suggest that type of gas around here. Most of the commercial loggers in the area
go that way. Think I would stay away from the AV Gas even though I have never tried it nor do I know anyone who has. Your Beast will make more power than you need using conventional mixes. Lubrication is the most critical
component in my opinion.