I've thought about the same, but we have a few guys with really high miles on theirs and I'm not reading about constant problems at high mileage. Seems once you have all the extended coverage stuff replaced (5 yr/120k miles) then you should be set. I'm around 130k on mine and will probably go to about 200, then upgrade to a 19 which should be coming in off lease around that time.This is one of the reasons i just traded in my 2014 with 80k on it. Was not about to risk all of the problems related to the Diesels DEF once the 100k warranty ran out. I wanted a new car also, had it for 5 1/2 years.