Originally Posted by Ray,IN
For use in motor-homes any of them work just fine. My son-in-law is nationwide maintenance manager for one of the largest trucking companies. He said all diesel engines in motorhomes are seldom-if ever- worked as hard as a fully-loaded freight truck/trailer unit running long haul routes. He said the diesel in a MH will never reach the first overhaul point if regular maintenance is performed, the coach part will be falling apart first.
Your sil is correct....same could be said on class 8 semi trucks as well....1 million plus miles is now the norm, not the rare ....for overhaul. Same true for transmission and rear ends. Been a long time coming, when I went to work as a diesel mechanic a engine @ 300k was all it'd do till in frame overhaul.
If only the turbo, emissions, cooling and fuel system could reach those milestones. But to be fair, all brands have that issue, lol
While technology had a lot to do with it, maintenance practices, stronger emphasis by fleets to lower cost per mile also played a big part.
Having been a "old school" mechanic, and now a real world Technician, I prefer the current engines, regardless of brand.