Just today I was in the area of the ONE E85 Wawa station within 50 miles of me, and I put about 2.25 gallons in a full tank of 93 E10 Sunoco, and it is fine
even on a factory tune and snail.
Sadly, I guess because they know that they have the ONLY E85 in a 60 mile radius, the price has now gone up to $3.10 a gallon, almost twice what stations get for it in most mid western states, where it is plentiful, if not available at EVERY single pump.