I’ve made no claims that E85 gets better mileage. I’m talking about studies done on E20-E40.
Those are not available to anyone, nor are they likely to be any time soon as far as I can see.
I suppose a person could blend their own.
As far as running E20-40 in a vehicle not built for it, who is going to honor the warranty?
My car’s manual says it can tolerate E10 and no more.