Get back to me when a manufacturer actually mass produces and starts selling one...and gets better than 58 mpg. Because IMO, if a hybrid vehicle gets the same mpg as a 100% fossil fuel powered vehicle, the hybrid is still a moot point.
Get America swtich from gasoline to diesel would be harder.
[/QUOTE]For me, a hybrid better totally shame a fossil fueled vehicle when it comes to fuel mileage or there's no reason to have one, so your little diesel hybrid better get at least 65-70 mpg (and have comparable power) before I would consider one over a Jetta TDI.
And you can't use emissions as an argument either because we've gotten internal combustion engine harmful emissions down to damn near zero.[/QUOTE]
A hybrid drive train will increase the millage of any ICE by ~25%, so if your getting 57 mpg on diesel you would get 71 if it was a hybrid diesel.
Again Hybirds are not a "game changer", they are really a wage to getting battery production up for plug in hybrids and then full electrics.