I don’t know how much to trust this info, but I recently did some work on a lawnmower carb. I bought parts from one of my local small engine places - one of those places that’s been around forever & everyone trusts. The guy who sold me parts told me that none of the new small engine stuff is coming out able to handle ethanol and that nothing has changed. These parts were for a Honda mower so its possible he just meant these parts. But I was surprised as I was going by the assumption that all the new stuff can handle it now. He said to use one of the additives for ethanol fuels - didn’t matter which.