I don't get it with the 7.3's. I had one and it never impressed me. I dumped it and drove a Dodge with a Cummins for 10 years. Now I have an '06 F350 with the 6.0 PSD and it's by far the best pulling and running diesel pickup I've ever owned or driven. After all the internet parrots (read stories and repeat them as if they were gospel) kept talking, we went to the track and my "junk" 6.0 PSD ran away from them. Gees, according to blogs, that's impossible. I also have well over 15,000 pounds behind my F350 most of the time it's moving. Crossing the same passes at altitude it makes the old 7.3 PSD I had feel like it was a 4 cyl gas engine.
Maybe I just got a good year. According to Ford, the 2006 6.0 PSD engine had less warranty claims than
any engine in a Ford vehicle that year. I guess I'm glad I believe those slamming the 6.0 about as much as I believe those saying everything built in South Korea is total junk. Although I haven't had it as long, my Korean made vehicle seems awfully nice.