anyone checked out
https://www.pure-gas.org/, fuel-testers.com. left side PRECAUTIONS-TIPS is some major help
i'm with many who have had to deal with major costly issues from E10 going bad,sucking moisture out of the air, replacing carbs,fuel pumps. had a boat gas tank go bad when it first came out melting the fiberglass inside, even losing a costly 2 stroke chainsaw engine. from it wiping the oil off the piston and rings causing it to seize.
lucky using the site i've found a local legal non e gas ,yes it costs, but my motors run better .