I run E0 in most of my off road equipment. the local fuel distributor sells it, 93 octane.
One thing you can do with this procedure is check you are getting E15 or E85. just measure the water you add and see how much more it pulls out. a few times I've done it and we are pretty close to the 10% mark.
I had a hygrometer that measured %methanol, back when we was adding some good stuff to the race fuel. We were allowed 5% methanol and I made sure we never got DQ'd for that.