I recently got the ok to sell E85 and other high performance engine Sunoco fuels, so if you are ever in need and happen to be in Salt lake I can make it happen.
It is e85-r so its more consistent then the pump e85.

 

All the pump E85 i've tested has been dead nuts on.
I have absolutely no reason not to trust it.

 

Huh, I ran E85 exclusively in the northville/novi/wixom/royal oak area from 2010-2014, with a content gauge in front of me. I never filled up with over E84 content. Varied between E74 and E84. Usually around E83 for me.

Maybe I was just unlucky.

 

I heard complaints about the pumps around here being in the 50s at times.

 

Really?
I have never tried the "winter blend" stuff. But all the summer stuff from Mobil, Shell, Meijer has been right at 85% +/- 1

I'll see if i can do some more testing when i have to fill up in novi / royal oak.

I plan on hooking up a flex fuel sensor, hopefully i can get some reliable data with that.

 

Forgive the quality of the test jar. It's been filled and emptied with various fuels for a few years now, i need a new one.
You can see the line separating the E85 and regular fuel is right at 85%.

 

I drove my subaru all year round for those 4 years, I had the most reliable ethanol from a Meijers in Novi, most of the year was 83or 84. I don't remember how far down that particular station went in the winter, but I don't think i saw over e80 from november to april.