Our coach is a 2011 HR made under the Navistar regime but was the last year they built the Endeavor on the Roadmaster chassis with Cummins engines. In 2012, the coaches were still on the Roadmaster chassis but came with MaxxForce Navistar motors. Some were not very happy with that engine as they used massive amounts of EGR instead of a catalyst with DEF like all other engine manufacturers used.
So last year with Roadmaster and Cummins was 2011 and my coach has been very dependable - our 3rd HR and the best one yet.
Not very happy with what new owners are doing with HR/Monaco as they are basically rebadged Fleetwoods on Freightliner chassis - not my cup of tea!!!