Thinking of going to E85 on the Dart
I run my car on e-85 and love it. Motor is 12:1 and hoping to have between 700 to 750 hp this year on it. I always test before I fill up but once you get to know the stations you can get away with skipping some during summer. Blender style pumps usually work best. Reason so much varation is that there are roughly 3 or 4 different varaition depending on time of year and where you live. Then takes awhile for what is in tanks to get back to blend needing depending on how much is used.
During winter months I normally just try to get a 55 gallon drum of e-98 and mix my own til I know the pump I go to is back to e-85 and just fill up the 55 gallon drum with it.
Troy