I'm starting this up in Engineering, but if it starts to go that way then perhaps Russ or Enigma could move it to the Politics forum? Before that happens I'd first like to bottom out technical issues. The question: What would it take to convert the US (and Canadian) automobile markets to having anything like the same proportion of Diesel vehicles as Europe? Diesel cars now account for almost half of all new vehicle sales in Europe. In France, demand for Diesels is almost double that of equivalent petrol powered vehicles. A Diesel Ford Focus will now develop more power and torque than a petrol version of the same displacement. It will also cost far less to run. What are the constraints on the US market? Are we dealing with tired misconceptions about Diesels being sluggish, crude and noisy? These are definitely preconceptions which created a lag period in Europe between the creation of quiet, torquey, refined Diesels and the massive sales ramp which followed, I'd like to know if these preconceptions are still around in the US? How about emissions legislation? While Diesels are far better for the environment in many ways, is the Californian legislation precluding the widespread sale of Diesels, and if so, is this because of the lack of availability of low sulphur fuel? What will come first, a useable infrastructure network of low sulphur fuel, or a surge in demand? Will Diesels ever make it to market in such numbers as have been seen across Europe? Thoughts please!