I have a 2016 lariat crew short box and just turned 116K, only thing done except for regular fluids are 3 oil pans that leaked, all under warranty. They don’t use a gasket, only some type of caulk like sealer, the last one has been leak free for over 60K miles so hopefully it’s good. Also had the front ring/pinion go out at 105K which the dealer claimed was first they’d seen. Mines a 3.55 rear end and my mixed driving is always around 18mpg, have seen as high as mid to high 20’s but that’s only at 60mph on long calm flat runs. Tows surprisingly well but not my main tow rig. I have pulled our 29’ with 5 sleds on several 700 mile trips, does fine with air bags but only see 10mpg below 65 and 6-7 at 75-80mph. I’ve been very happy with it but my wife’s 18 with the 3.5, 10 speed and 3.73 has quiet a bit more grunt.