I'm getting, on a flat highway surface, 46MPG, but I can't travel in a straight even line forever.
Haven't tested city driving, but lately I've done more city traveling, refilled last night, and my avg MPG was 29.3.
Usually, if I do 70% highway driving, I can get up to ~34.5MPG. With 50/50, it's 31~32MPG. If I spend more time driving only city (<8 mile round-trips), it gets down to 27~29...
A fan of Ford, Freedom, Duncan Yo-Yos (but not Duncan Hines confectionary), and Strattera...