Most Common Engine Issues?

Derates are not good for getting things done. I'm not sure what even happened, but 3 times at the dealer to finally get something fixed, and one thing, suspected weak DEF, which turned out false, so I expect something else other than sensors, was changed, too, as it was turned up just a bit.

 

No, it was governed from day 1 right at 71.5 mph, 460k later it will do almost 3 more just when they are going to put me in a different one, I drove a bunch for service, with gps to verify speedometer, some were slower yet, some would do more. I don't run at the governor most of the time, but I do check them.

RPM at governed speed on the tach increased a bit, too. Not quite 100 RPM. The one I drove while that one was down was a 2014, just a touch more yet, and those all have had Isri seating, less fatiguing driving them, as well.