I would stay away from the ethanol. I hear it tears down rubber and the fuel doesn’t stay good near as long. I have two classics vehicle and I run premium fuel (makes me feel good even if it is a waste) but it is the only way to stay away from ethanol here...
I also don’t use any ethanol fuel in small engines and I have no problems there.
My thoughts are the same don't use it in anything other than daily driver. If its subject to sit for long periods I use 92 BP or Mapco Both are owned by BP.
Their premium is Amoco leaded after they bought Amoco. Motorcycles ,small engines seem to run better,cooler . Built motors will ping knock with out it.
Yes you can retard timing to cure some of it. Now you have dollars spent and not getting full potenial from your motor. Your timing needs to be set to your cam to get the most bang for your buck.
I agree that today motors are built to run it. But when you tear them down depoist buildup is shocking. If I have a lot of money tied up I stir clear of ethanol.