I checked the cnn website.
The program was called ''4 Bucks, What's Next?'' and will be repeated today at 8pm est or 5pm for west coast.And then again at 2am and 11pm est and pst respectively...
Heres the link to the program and the time schedule:
http://www.cnn.com/CNN/Programs/
The part on hypermiling starts around the 10min mark at the beginning of the show.