‘Good responses here so far. I would ask around & find a dependable, trustworthy diesel mechanic in your area unless you already know one. I would offer to pay him something to go over the truck as if this were his purchase & I would do this BEFORE you buy it. If the seller has a problem with this then you don’t want the vehicle. He may be hiding something. If some problem turns up & you don’t buy the truck then the money would still be well spent because you will have saved a pile of trouble.
I take my truck to my diesel tech every 15,000 miles to change the fuel filters even though I am capable of performing this simple service because I also have him check the truck over completely (once again, as if it were his truck). This interval seems about right to me & he agrees. Also, I trust him & he does this for a living. He very likely may find something I might miss.
2013 F-350 Lariat 6.7 L PSD Crew Cab Dually, FX4, white platinum metalic tri-coat with black interior, N-Fab step bars, factory spray-in bedliner and 5th wheel hitch, trailer tow package, integrated brake controller, upfitter switches, Sync with My Ford Touch, memory group, remote start, reverse sensing with rear view camera, nav, satillite radio, Weather Tech floor mats, limited slip diff, moon roof, climate controlled seats, engine block heater and tailgate step.
2014 Lifestyle (formerly Carriage) 5th wheel 38' long with 3 slides & all the goodies.
SOLD: 2005 F-350 Lariat, 6.0 PSD, Torqueshift auto trans, crew cab, SRW, short box, FX4, ESOF, limited slip dif., tow command, upfitter switches, 6 CD changer, Lariat Lux. package, camper package, engine block heater, triple A-pillar gauge set (Autometer) with pyrometer, trans temp & voltmeter, MBRP 4" cat back exhaust w/5" dual wall chrome tip, dark shadow gray/ med. flint interior.