Interesting! 60mpg in a Hummer....
Anybody remember the Eco-rocket, or "green monster"?: The 60's/70 Impala retro-fitted with a biodiesel engine and tranny? This seems to be along the same lines....
My opinion is that the future of mpg is infinity, 'cause there won't be too many more..."gallons". I'm hoping to see a "Camaro-affordable" Tesla-roadster. It's coming... but untill then, biodiesel, and E85 performance engines seem the way to go for me