Fuel type question

Hey all. First post here. Figure there’s more chance of good technical advice so paying here after posting on AZ lol habiti guess.

Was at a Shell Station today and saw they had ethanol-free 89 octane gas. Started researching, but couldn’t find a definitive answer for our platform regarding ethanol-free fuel. I’m assuming 89 is not usable, but what about 93 ethanol-free or the Chevron 94 pure stuff? We have lots of marine fuel access here, and wondering if it’s worth finding and paying for?

Any links to threads i couldn’t find are welcome.

Thanks!