Our first Ram (2013) ate the cam at 185,000 miles. Always ran Mobil 1 and changed oil every 7,500 to 10,000 miles. Dealer replaced the cam and lifters and we put another 10,000 miles on it before trading for a new 2019 Ram 1500 Classic with 5.7L. We have about 7,500 miles on the new one. We were...