One of the fellows in the Short Wing Piper Club wasn't checking his fuel (Michigan has a law now that the pumps do not have to be labeled) and he brought the rubber  hoses that had connected the wing tanks to the airframe, one was completely clogged and the other was near.  Sunday I got 20 gal at the Shell station and checked it and it didn't have any Alcohol in it.  Still safe this week.  JohnD