Ethanol vs Non Ethanol fuel

I replaced the deteriorated rubber in the fuel system of my 456 GT, which crumbled over time.

I've read that ethamol hastens its demise.

So, now I fill up with non-ethanol gasoline whenever it is available, and it is usually available.

See ... Ethanol-free gas stations in the U.S. and Canada

 

Reynolds my 2 cents. With a 575 I only use non ethanol fuels mixing marine grade 89/90 evenly with 98 unleaded race fuels found at nearby tracks. From what we've read 550's are more exposed with their fuel system.
If you drive your car on a regular basis you may be able to get away with ethanol fuels. Thinking here is, if that fuel keeps moving through the system it won't cause as much trouble. Most deterioration happens when this fuel sits. If its a weekend driver sitting from time to time I wouldn't do it. Not a fan of octane boosters myself. Would be more inclined to look at ethanol neutralizer additives first as a last resort before adding boosters to lower grade fuels.
Would suggest link mentioned above and checking local race tracks and some speed shops for higher octane fuels should you still desire.
Bill
FL