I've seen 99.9 mpg over 3 miles, but it was one pulse, and a loooong glide.

Over a longer distance, the best I've done is 51mpg over 75 miles. That was mostly "freeway " driving. By that I mean heavy rush hour traffic going between 25 to 45 mph most of the time! I'd guess about half the tank I was going normal speeds, 60 mph or so.