Interesting...
http://www.greencarcongress.com/2007/06/cmu_plugin_hybr.html#more
Well-to-Wheel Greenhouse Gas Emissions
Fuel CO2-equiv.
g/mi
CTL gasoline 536.7
CTL w/ CCS gasoline 325.1
Gasoline base case 344.0
PHEV, coal generation 264.6
PHEV, coal IGCC w/CCS 105.8