I have just received my first truck with a HO Cummings diesel. The truck has 100 miles on it and I am leaving for a 6000 mile trip this week. I am told that there is no break in period for the engine but I am wondering if I should be having it serviced in any way (other than manufacturer recommendation) while on the road? I will have 5500lbs in the bed for the second half of the trip.