Hauling heavy loads wear and tear

[Lonestar10]

basically the less time you spend in the lower rpm band "below 1300" at full power the better. really 20k-50k doesnt really matter as long as your not beating the crap out of the engine at lower rpms. the lower the rpms the more internal vibrations or hammering effects on the engine.

i go off my dads truck a 2007 t600 cm870 so basically same engine hes hauled everything from 20k to 100k with it running flatbed and RGN and when he overhauled it at 1.2 or 1.3 mil the only real wear they found in his engine was the cam bearings his crosshatching in the cylinders was still visible none of his main/rod bearings were bronzed or coppered still nice and silver. he runs rotella 15-40 and lucas and it has so far worked for him he runs 65-75mph but he downshifts around 1300 when loosing speed and runs around 1500rpms down the road and runs off his pyro when climbing hills to select his gear