I don't know why ethanol is seen as any more corrosive than petrol.
Is it, Alvin?
Either way, 90s Skyline lines can take it and most fuel injected fuel lines should be able to, unless they are crumbling away.
Remember the Brazilians have been using this shit for decades in the same or lesser cars and would probably laugh at the superstitions floating about here.
A mate of mine has a few petrol stations and even he thought the stuff was evil for whatever reason, til I showed him my dyno graph before and after! Now wants to run in his race cars