Folks,
As there is much discussion about CAFE standards here is a great Wikipedia article that explains it. What I like it explains the Fleet fuel economy. Which basically means if they sell a bunch of Chevy Cruzes @ 40 MPG when can sell a few Camaros and Vettes @ 26-30 MPH.
The stuff is not 100% up to date, but at least the math is there.
I think there is hope for a few more years of muscle cars.
http://en.wikipedia.org/wiki/CAFE_standard
Enjoy,
Ryan