Anyone running E-85 fuel?

[INTMD8]

Funny thing about that. I was talking to my friend with the flex fuel expedition about her E85 use. She is getting it at $3.35, and says it's only 2mpg worse than 87 in her truck. She also says that using a couple gallons of 87 in a tank full of E85 gets the 2mpg back.
I cannot verify any of that, but she is my best friend and has no reason to lie about that to me.
So, in her truck, in her experience, E 85 is a huge win compared to $6.50 87 10%.

If that's the case the o2 sensors and composition sensor does not work in that truck and it's just driving around dead lean on E85.

Otherwise there is no way around the math.