The effects of OLD gasoline in a classic car

Keystone said
Do you have the option of ethanol-free where you live? If you haven't seen this site before, it can be helpful: Ethanol-free gas stations in the U.S. and Canada

For me, anything I have with a carburetor gets the ethanol free. I also run E0 in my Duc which is EFI but has a nylon tank that absorbs the moisture that the ethanol absorbs out of the air, then starts expanding to the point it causes problems. The problem was so bad there was a class action law suit over it and Ducati gave everyone a one-time new free tank even though the bikes were way out of warranty.

Wow,
That list you linked to is really helpful and I've got a station right here in town. THX
I've got a 65 that is driven enough that it hasn't been a problem. The six fours got 106 race gas and that stuff is like good forever. After draining and cleaning the tank and rebuilding the carb last wknd, I'm actually in the process of redoing all the lines on my 69' that had sat for a while and had planned on using sta-bil or Seafoam going forward but will now additionally use the 92 octane ethanol free available.