Hudsons and Ethanol in gasoline experience

With ethanol in the nearby gas pumps I wonder the effects it is having or if possible buying non-ethanol gas is best. I know there have been individual articles about damage and repairs - I have seen a fuel additive that is said to diminish or eliminate the effects. Living in the past I recall buying a Hudson out of State and with minimal R & R of fluids and spares on hand would drive it home not having the money or desire to have it hauled. Those days are gone I guess - are they? Can you run an old car on Ethanol added gas ? Can you find non-E if on a trip ? Since some time has gone bye I wanted to ask. Gert Kristiansen - member since March 1968.
Comments
"On the downside, ethanol is less energy-dense than gasoline – meaning that there’s more energy in a gallon of gas than there is in a gallon of ethanol. In general, ethanol has about 33 percent less energy than gasoline. So, the more ethanol in the fuel, the worse the fuel economy you’re going to get. Gasoline with 10 percent ethanol yields about 3 percent less fuel economy than straight gas."
Bottom line for me- if you have to run it on a trip, ok, but after the trip dont leave any in the tank or fuel lines or carb.
Listed by state for ethanol free fuel, and if its regular or premium.
I wonder if that might have been due to "green" fuel ?