How many 4th gen 5.7 out there with over 200k ? 300k? How many hours ? Did you have to replace anything out of the normal? I have a 2015 im putting about 30k miles a year on. I am close to 120k and kind-of want to trade it in....but on the other side..ive taken pretty good care of it..and most of my miles are 65mph on an easy 30 mile long road to work...I kind of want to see how long I can make it go. I've never kept a vehicle past 200k.