For all the ethanol bashing (well deserved), I haven't seen anyone mention ValvTect fuel treatment. It's marketed towards marine uses as an ethanol buster but also has Sta-Bil and Techron like features.
Boot turned me on to it last year when I was whining about my mileage going south. I've used it intermittently, seems to make things better.
This is my signature block. There are many like it, but this one is mine.
My signature block is my best friend. It is my life. I must master it as I must master my life....