Hello all! New to the site so this is my first post so please be patient with me. I have recently purchased a 2015 f250 lariat fx4 6.7 srw crew cab short bed with 228k miles on it. Truck is from Texas and well taken care of by the look of it. Hardly any scratches and interior is in pristine condition. Does not have a hitch in the bed so I’m assuming it hasn’t pulled a lot. It is bone stock. Has had a fuel contamination kit installed at around 100k with injectors and such. My question to you is what do you think I need to check or replace before something bad happens. I am already planning on replacing any kind of fluid that is on the truck. Including differentials, coolant, oil, etc. do you recommend any fluid additives for tranny or any thing else. Do I need to be worried about glow plugs falling apart and ruining the motor? Or the dpf system failing? Should I delete dpf/def? Any response is greatly appreciated! Have a great day!