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I know this is somewhat off topic, but from reading posts there seems to be some good expertise in this area. So, here goes. What is it about diesel that allows the engine to generate better gas mileage and greater torque? Is there something inherent in the fuel itself? Otherwise, why couldn't you design a gasoline engine with similar characteristics to a diesel engine? Why do diesel engines tend to last longer? Part of the reason I am asking is I just got a 2008 MB 320 Bluetec that is unbelievable. Cruising 80mph on the highway, with plenty of top end, getting 34mpg. In addition, it feels like this car is quicker to 60 and above than my 5.7L Hemi Jeep Grand Cherokee. Any ideas?
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