With a good grade of E85 I see an AFR of 9.2 to 9.4 consistently. I am very picky about where I buy my fuel also. I try to exclusively use Sunoco. I got in a bind a few weeks ago and used another station- now seeing an AFR around 9.4 to 9.7. You should be in the right range with a full tank. I believe that the advertised target AFR for E85 is around 9.1 ish?