All diesel in MN is ultra low sulpher even the off road. The cheapest injectors I have seen for my dodge common rail is $600.00 apiece so you don't really want any problem with them.
I remember being taken through a diesel shop a few years ago when common rain was really becoming popular. The shop was one of the very few in .au that had the gear to repair common rain pumps/injectors. They told me of the pressures and if a seal was not in just right, the pressure would cut it and the metal it was to seal.
The higher the pressure, the better atomization of the fuel can be achieved. They even said that there was not just one injection of fuel like "normal" diesels do, they can do a pre-injection before TDC, then one at TDC then one or two after. It just makes the "blast" of the fuel more even, not just one detonation. One of the reasons the engines are quieter, there is no one loud knock, but multiple smaller ones. They can time it so the fuel burns more completely this way, more efficient? possibly but the addition of anti-polution parts, that may be equaled out.