Yes, later today, I am going to add 50ml of pure water to 50ml of E85, and see how much petrol "floats to the top".

I was just thinking of what to do with my 100ml after that.
I don't want to pour it on the ground or down the drain.
I figure I will try to pour the top layer ( presumably gas ) back into my gas tank... the rest? Mostly water with some ethanol???

Ideas?