I have never done it either. I have two dedicated 5 gallon jugs, and a 2 gallon filler jug. When the 5 gallon jugs are empty, I run down to the local airport and fill them with 102LL fuel. I then mix in Amsoil Dominator oil using a 3 oz. Dixie cup, 5 cup fulls per jug. No ethanol, about...