Nice experiment, NASAgineer!
Please don't do what gonavy says, I don't want to wait through several trips at each speed to see the results for 70 and 80.
Kenny's results at 50mph with cruise control are interesting to me, because I can arrange for much of my driving to be at 50.
--Walter
P.S. I'm afraid the first numbers my eyes were drawn to were the temps, 56, 55, 64, 55
Here it's 30F and falling with snow