the old diesels emitted black soot, the newer ones only water vapor is emitted. Soon most newer heavy duty diesel trucks will all be equipped as such and the sight of a trucker flooring his rig and blowing out all that black smoke will be a distant memory.
All I want is a small pickup truck with a 4 cylinder diesel, not one of the massive V8's currently on the market. A real work truck with plenty of torque to haul boat trailers up very slippery launching ramps. Also for use in heavy snow conditions. A good diesel engine is hardly broken in after 100, 000 miles , so this maybe the second to last vehicle I will ever need.