Kodak wins! Sorry there wasn't a prize but I am amazed that you got the car and engine right!
Nope wasn't selling anything.
The car is a basically stock 2005 Mustang GT (4.6L V8) that will run 13.8s at 99mph at the local drag strip. I strive to get great gas mileage so I can afford to go drag racing... a Dr Jekyll Mr Hyde kinda thing
I tried the experiment on a different day/road and managed over 55 mpg.
Some of the things that are helping the car achieve high mpg:
1-New synthetic lubes in trans and rear axle
2-Tires seem to have very little rolling resistance as evident when you romp down on it
3-Manual transmission - no torque converter
4-Windows up, AC off
5-For a few seconds on my initial run, I drafted a van. It left me rather quickly and I never caught back up to it. I do not know if this occurred during the time plotted.
6-That's all I have.
I trust the data to about +/- 3 mpg. Unfortunately, I will never have an entire tank where I didn't romp down on it at some point. I suppose I'm a hypermiling renegade but its all good!