Why not flex-fuel plug-in hybrid vehicles?

Even hybrid cars, or plug-in hybrid vehicles do not push the envelope of auto technology far enough


Flex-fuel plug-in diesel/gasoline hybrid vehicles can completely change America's national energy paradigm - long before fuel cell vehicles become either cost-effective or technologically feasible.

Such vehicles could easily achieve well over 100 miles per gallon, utilizing gasoline, diesel, ethanol, biodiesel, or combinations, while completely ending foreign oil dependency. (more)