The engine is original. I run amsoil since it's 1st oil change, always been 15w40 always @ 9 to 10k changes as well. It had the gde epa tune for last 75k but recently had to change due to making some changes with the exhaust. It was 100% factory for 307k tho. I did forget it has a new trans as...
2015 ram laramie. Flipped 307k last week. Has been in the family since new. 1 tone ring, radiator, clutches in rear end and turbo had to be replaced. Everything else is going strong.