Join Date: Jun 2019
Location: Generically Midwest
Fuel stations HAVE had problems over the years with contaminates, wrong fuel in the supply tank, water mixed in and sometimes even completely wrong product put in their holding tanks.
I would check local news feeds and local forums for that station in particular. See if anyone else has had contaminated fuel of some sort recently. Stations that have issues (which usually affect dozens of customers) will often pay repair bills, so worth checking into.
My chemistry isn't the greatest, but I would guess the next most likely culprit would be the E85 others have mentioned. Not sure how it would dissolve parts though on two different bikes.