dave walton wrote:
Regardless of how the fuel is ignited, diesel contains roughly 30% more BTU's than gasoline. Any moderately efficient engine will give more MPG's on diesel. I doubt that a compression ignition engine run on gasoline will be 30% more efficient than current technology using a spark plug.
I'm not so sure. The reduction in pumping losses due to eliminating the throttle plate would help a lot, especially at partial-throttle operation, which is where car engines spend most of their time.
