FWIW, the EvoDynamics guys keep (or used to) a 50g barrel in the shop (they fill it up at the station in Denton that's pure E85, most of the places in Dallas are E76-82, here's my log from when I had the ECA and was on E85: http://forums.evolutionm.net/7795561-post1.html). They didn't have any issues with it picking up water, but they did use it quickly.