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The thing about all the diesel motors is that they are 300K mile motors that are surrounded by 100K mile parts, like alternators, turbos, wiring, trannies, etc...If you keep any truck for 300K miles be prepared to do a little more than regular maintenance as the parts around the motor are the ones you will be replacing
You might want to check this site out. Lots of good info here in the videos.
http://powerstrokehelp.com/