Efficiency car and mobility

What is the real efficiency of our mobility with cars? Enlightenment about a lot of misunderstoods about the efficiency of engines and the production of fuel.

Ideal drive for cars
	For an ideal drive system with 100% efficiency, only air resistance and rolling resistance has to be calculated

Diesel engine with 45% efficiency
	The very high efficiency of modern Diesel engines is much mentioned., but this high efficiency is only reached in a small area of operating conditions.