Science Ed, a Fail! Law and Marketing a Success in USA!
Be careful how you store it. I know of some foolish folks who have stored hundreds of gallons of alcohol free gasoline in above ground tanks in buildings (indoors) which is very dangerous and illegal in most places due to the fumes. Tempting to do if you must drive a long ways to purchase it but not worth the risk IMO. Most rural agricultural people that I know (friends and family) follow the regulations very carefully for both gasoline and diesel fuel.
Spray Carburator cleaner works OK for me, a tank soaking if it is very bad...
Easy to find cheap used lawn equipment if you know how to clean it these days...
I don't fill up for a trip until I get out of town and find a station that is low or zero in corn fuel, except in winter but that may change when Corn Distributers fund Congress re-elections enough to get corn fuel everywhere all year round, and IOWA is solid corn with massive petroleum products used to grow it making Congressmen indispensable. Lawyers are smart that way... Maximize the middleman grow the economy that way and make them all fund their campaigns... Sell more carburator cleaning fluids and new cars, small engines with more horse power... BRILLIANT!!!
Science education is a FAIL, marketing and law a success!