The best I can get nowadays is 18mpg and that is if I drive like grandma the entire time. I use to get MPG like you but I have recently richenned things up a bit because my exhaust gas temperatures were getting pretty high. I want to keep my valves and prolong my turbos life. :tup:
I didn't buy my car to drive it like a grandma so realistically I get between 13-15mpg and even much less than that if I'm really aggressive. :? Overall I end up spending more money for E85 than I do for gasoline.