My 15 just hit 70k this morning only regular oil changes, battery replaced at 42k (dealer said it just went bad) been tuned since 15k (no AFM) cabin air filter replaced twice nothing major so far had doubts at fist with the trans but that’s part of why I tuned it to be in 8 always and tires and other bolt ons. Oh and it’s the 6.2. Started running ethanol free fuel 1 week ago runs smoother.