Power raw/real (watts): 313.41 | 1305.87
Calories per minute, hour, and mile: 18.73 | 1123.6 | 70.2
Approximate Miles per Gal: 441 MPG

Being very large, and reasonably fast hurts my mileage. I used 16 mph in this estimate - on a good day most of my ride is closer to 20, and my average counting stops is 15.5 mph.

20 mph for me is over 400W!