Well, I just bought a diesel pickup for my tow vehicle, and I sure hope it does what I hope it will. 2005 F250 XLT Supercab 6.75' bed 4WD 6L Powerstroke with the 5 speed auto, and it has an AFE air filter kit. Gorgeous truck, owned by an older couple in their 70's who used it to tow down to Florida every year, so it only has 50K miles and has never seen a northern winter! It came with a 16K Reese slider fifth wheel hitch, and has 2600 lb payload. I am really looking forward to seeing how it does with my 20 ft car trailer!
Congrats.... I'm sure you won't be dissapointed with it's towing ability. The problems with the 6.0 psd are now well understood and with some simple steps taken can lead to many trouble free miles.
1. Use only Motorcraft oil and fuel filters (No aftermarket filters... period!)
2. Go to a Ford dealer and have the latest flash installed on the truck (cost is ~ $100). This flash will monitor your engine oil temperature (EOT) and your engine coolant temperature (ECT) differential.
3. Change oil every 5k miles using ONLY Motorcraft oil filters and CJ4 API rated diesel oil. If you live in a cold climate you may consider using a 5w40 synthetic oil.
4. Change fuel filters every 15k miles using ONLY Motorcraft fuel filters.
5. Don't let your batteries get weak to the point the truck will barely start. Weak batteries can kill the FICM module.
6. Add a coolant filter (optional). Very cheap and innexpensive modification. (i.e. Sinister coolant filter)
7. It's time to change your coolant using a Ford approved coolant if it hasn't already been done. I use Ford Gold coolant for the record every 50k miles and distilled water.
7. Enjoy many years of service from your truck.
BTW I currently have an 05 6.0 PSD as well and have 167k miles. I don't have a coolant filter, but if you do the above your truck will last many years and miles. Everything on my engine is original except for an EGR valve and an engine seal which is really outstanding IMO.
I have a 06 Ford F-350 CC Dually FX4 (completely stock), it's got 66K on it and runs like a clock. I agree with FISH, but I'd add a scanguage2 on it so you can monitor both engine coolant and oil temps. I run Mobil one for turbo diesels as well. Stick with the maintenance schedule! It's a costly oil change with synthetic (approx. $100.00) but well worth it. IF THE TRUCK STAYS STOCK DO NOT PUT A TUNER ON IT! I run a cetane boost at every fill up! Ave. 15mpg around town (hand calculated).
Also go to a Ford dealer and have them run an Oasis Report on it to see all (if any) warranty work was done on it.
Lastly, if you keep it stock go buy an extended service plan on it.