Analyze it, pick it apart....I've been told this by a guy who refers to 7.3 as the "7.3T," that it has been around for 60 years, and says there is a "new graphite aluminum 7.3" that I can't get him to elaborate on. Anyway, here's the comment....
Dont forget winning Lemans racing. Deisel is going nowhere I can assure you. Its a less combustable fuel which means the engine has to work harder to produce less. The way they make up for this and get the long life of them is keeping them at a low turn rate inside the engine. If the engine only turns 1000rpm constantly then its thousands less revolutions per minute which turns into less wear and tear. Deisels are slow vehicles and that why I dont prefer them. But as I said up there before I am getting older and appreciate them more because of the ability to buy one and the motor outlast the body (regardless of make)