Originally Posted by Swamp Donkey
No diesel offered would be my guess. And I am also a believer in BrokenTusk's theory.
I was speaking mostly in jest. But theres a lot of things that simply don't add up. When I started researching new cutting edge engine designs I was amazed when I found out that all the "new" crazy tech was anything but new. Most of the same concepts and principles of making machines more efficient have been the industry standards for decades. Examples: Heat regeneration tech, seperating the compression and combustion portions of the engine to incorporate intercoolers, etc.
These things have been done in power generation plants and oilsands processing & upgrading since long before I've been alive. Downsizing the tech to fit in a car shouldn't be that difficult with the resources of these major vehicle manufacturers. I honestly see no reason our vehicles don't hit 35+ Mpg's standard.