In all my years I think I’ve seen just about every different flammable fuel in a small engine tank. Gas, diesel, acetone, lacquer thinner, mineral spirits, etc. About five years ago local station was found to have over 50% of their 87 Octane fuel to contain water. Had 25-50 lawsuits because vehicle shut down within one hour of filling up, including one of our delivery trucks. Was traced to their distributor who drained his tanker to complete the order. Real mess for all of us who used this station.