Well I will be switching to E85 with my F1-A setup and wanted to see how those that are running the corn are liking it. It's evident the performance from it, but those that are running pump E85, how much of a pain is it to test? And when you do you test? Are you adjusting your tune? I have no plans to use drum E85 as I don't have the room to store it. I would think you find that one station around your house that has a good % and stick to that one?