I'm in the "others report none" category at over 30,000 miles. With the fear of EGR and swirl valve problems, I recently installed the Green Diesel Engineering software (not available for your model year) that defeats use of these valves. At the same time I disassembled the EGR valve to clean it and was surprised at how little soot was in it. Much less than I expected based on reading other peoples' woes. The only driving habit I think that could be pertinent is that when the engine is started, it's usually to drive a fairly long leg. I haven't been very picky about the fuel, and don't use additives. The worst engine problem so far is a blown glow plug. I've gone into limp mode only once over a turbo problem that never cropped up again.