Jack, I have 1825 miles on it. I should mention that mine too started out around 14. There's a lot to be said about the break-in. Your MPG should get better.
I don't drive like a dud all the time - I passed a slowpoke the other day going about 40. I goosed the Hemi and I was guessing "OK probably doin' 60." I looked down and I was at 82. What a ride!