One of the reasons I went with diesel is that you cant find a Turbo on a stock gas truck. I live at around 6,000 feet and a turbo helps at high altitude.
The downside is that it gets Cold here and Diesels dont warm up to fast.
The Powerstroke is a 900lb engine block (dry) so it would typicaly take 10-20 minutes before the heater would start blowing warm air, which was about the length of my comute.
I compensated by installing a remote starter, to fire her up 10 minutes before I leave in the morning when its cold. Our neighbor down the street was about ready to call the fire dept. the first time I did this on account of the grey smoke that filled the block.
I could plug in the block heater overnight if I parked the truck in the driveway. But I can't theirs a trailer in the way.
Diesel maintanance is a little different than gas maintanance.
You need motor oil designed for diesel engines. I think I remember reading its because sulferic acid is a by product of the combustion process, but dont hold me to that.
Rotella T is the most poplular choice and is pretty cheap at wally world or Sams club. You need 15 quarts for a normal change.
Jiffy Lube does Diesel oil changes with Rotella for around $60.
There are 2 batteries to run the glow plugs and turn over the really, really big starter.
Fuel filters should be changed on every oil change (my preference) as they will muck up.
Also there is a fuel/water seperator that needs to be drained when the idiot light comes on.
The 7.3L PSD in the Fords is a Navistar (International-Harvister) T444E that International puts in its school busses and smaller haulers. Its an industrial engine thats designed to be easy to maintain for a fleet.
This also means that you can go to the local International dealer for engine parts and save 20-50% off what the Ford dealer will charge you.
A word on Cavitation:
I dont know if this applies to any other diesel than Internationals, but I believe it does.
Diesels vibrate a lot, and all that vibration can cause bubbles in the coolant around the combustion chamber. A few 100,000 miles of this and you get little pin-holes in youre cylinders.
A really important, and often overlooked coolant additive is CCA. (dont ask me what it stands for) that prevents this.
International sells little "pregnancy strips" to test the level of CCA in the coolant. It changes color based on the PH ballance, like in a swimming pool.
So, If you buy a diesel used, make sure they used the additive in the coolant.
The local JIffy lube never heard of the stuff, so I ended up taking my truck to the Ford Dealership heavy truck center to have them flush the coolant and put the right mix back in.
Your local Ford/Dodge/Chevy dealer should have a truck service center that will look over the rig before you buy it for a modest fee.
But on the other hand, you will never have to deal with spark plugs, spark plug gap, spark plug wires, coils, distributors or electronic ignition ever again.