Excellent find I am a mechanic in the small engine industry . I have a lot of training from companies like Stihl,briggs and Stratton and others about what ethonal is doing. I deal with this daily very frustrating what the EPA is doing. We have people buy brand new snowblower,s leave gas in them all off season with no additives and ruin the carb. Then get upset at us they need a new carb on a machine used once.
FYI, unless I'm mistaken, Shell V-Power (91) still has no ethanol in it. My bike doesn't require 91, but I switch over to Shell 91 in late September (and just keep topping it up with the same), then throw in some stabilizer with ethanol treatment (supposed to help with any condensation) just for good measure...and it was only a few bucks more than the regular stuff.
Once it's evident it's time to put them both up for a period I'll hit them with stabilizer, go for a 20 minute ride on each bike to warm everything up and circulate it, and then onto the tenders and parked.
I've been on the shell 91 for years, people used to scoff at me re; ethanol. I have never had a fuel issue. 2strokes are picky about fuel.
It's an interesting article, but I must question the science. Yes, ethanol is a solvent, but so are almost all the other components of gasoline. He states that 28 days is his rule of thumb because after that the ethanol separates and won't recombine. I need to buy some gas and let it sit in the lab here under different temperatures to see how correct that is. He's in Vegas I believe, which may make a big difference. I'll try to remember to get back on here with my results in a few months.
That all being said, I also fill up with premium for the last few tanks of the year just in case. L