I can’t believe that in 2018, major truck manufacturers cannot build an emissions compliant engine that performs well and is reliable. New cars are cleaner than ever and w less scheduled maintenance and last longer than old ones. Mercedes turbo diesels have run egr systems since at least the 1970s and while the actual egr fails eventually, they don’t cause any engine problems. And those were much, much dirtier engines burning much dirtier fuel.
There are late model HD pickup trucks w 400k miles running DEF w zero problems. None of this makes sense.
