As an O/O I wouldn’t touch an emissions truck. Like
@Mike said 2004-2014-ish was pretty rocky for emissions trucks. The newer ones may be better. Want proof? CAT quit building on the road motors for a reason.
As far as dependability, non-emission motors won’t derate, threaten a parked regen, plug DPFs, piss and moan about DEF, or any other bullshit. If it’s running, leave it running it’ll get you home.
I carry a scan tool. I have access to the same software the dealer does. If I’m on the road I can look up the exact same info as any mechanic.
We’ve had a couple of good discussions on preventative maintenance. In my opinion, it’s better to replace parts at home, before they fail. Instead of trying to maximize service life from a part and having it fail on the road.
Another wallet grabber are tow trucks. $750-1500 for a tow kinda hurts. Knock on wood mines not been on a hook yet.
I carry tools, spare parts and fluids. Buying fluids OTR is expensive.
@mndriver argued that if your truck is well maintained you shouldn’t need spares and fluids on the truck. I see his point and agree with him