



New to me 2022 2500
I got it for $35k with 73,000mi. The interior is pretty much spotless. The exterior as well aside from a door ding and a small ding on the front pumper below one of the recovery hooks. But I get 22.2 mpg and that includes driving from phoenix (1100ft) up the Mogollon rim (8400ft) back home.
Anything I should watch out for or be a stickler about? First Cummins but 4th diesel. What are the recommended oil changes and fuel filter changes besides manufacturer recommendations?
Thanks in advance.