The oil companies looked into this long ago. It’s bad.
I took my van to the Honda dealer yesterday for an oil change (turns out it didn’t need one yet) and was chatting with one of the service guys. I told him my theory, and he said I could be right that ethanol is what destroyed the part in the fuel lines.
However, he also said there wasn’t much of a chance of getting together a lawsuit against the big ethanol producers. Too many powerful friends. This is what our country has become. *sigh*