If that is all you can get you should be prepared for extra maintenance. Anything rubber will suffer. They do make special fuel hoses just for ethanol so I would start by replacing all the fuel lines. The Carb internals will deteriorate faster and you should stay on top of that. You don't say what engine you have but it probably isn't made to run ethanol and may need a rebuild sooner than later. There will be some on here that disagree with me about ethanol but I know there is problems associated with the stuff. As long as I can buy real gas I won't put ethanol in anything.
Definitely replace your old rubber lines with the ethanol resistant kind. I have an '81 chevy and all of the rubber lines got ruined by the ethanol fuel here. They are old, but they were fine for a while and then all of a sudden the truck started running poorly. Timing is spot on, carburetor is too. Fuel filters are new, but the lines I haven't replaced on top of the tanks are shot, causing the fuel pump to lose prime and cavitate. On my '65 I replaced all the rubber lines before they got too bad, and they were in bad shape when I took them off. I was shocked that the truck even ran as good as it did, because the hoses were very brittle and deteriorated. May have been old age, but I wasn't taking any chances. Definitely rebuild the carb with ethanol resistant parts too. I think from there you're good to go with keeping it tuned up.
