I have a 2014 Ram 1500 5.7 with 90,000 miles and I replaced the ex manifold on one side. I think I will need to replace the other one shortly too. Other than that it has been a good truck. Spark plugs are almost due at 100,000 so i will be doing them soon. My cruise control button won`t work at times but if I smack the back of the steering wheel with my hand it will work again for a while. I replaced the pcv a couple times for maintenance and one of the sensors (IIRC I think it was the crank sensor) went bad and i replaced it. Check the rubber exhaust hangers if you live in the salt belt. I had to replace two of them. The e brake levers at the rear axle were rusted and I needed to clean them and lube. No other issues that I can think of. I change my oil at 4,000 miles with 5w20 pennzoil ultra and 5w30 in the summer. I have cleaned my throttle body a few times also. I am happy with it.