There had been talk of E15 here but I haven't heard anything lately. I don't know how far back the compatibility goes but I run it in everything due to availability of anything else here. I haven't had any issues even in my stuff from the 1950s. It can damage the valves and seats though but I have yet to actually see it.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!