2017 pro4x. I have 50k of which 25k-30k is towing between 13k and 13500k all the time. Nothing much but AC actuator. Mods include Titan 50gallon fuel tank, and air bags. Trans fluid changed once, coolant once, front and rear diff hold amsoil severe gear. Next will be tires down the road and serpentine belt. Been on the road for seven months beating on the Cummins pretty good. Just put some new Valvoline Premium blue 10-30 after 12k miles. Resting now due to the virus in Florida. Back to IL one of these days???? Not to crazy about the OEM batteries, the battery post have to be treated frequently here in Florida. So far not to bad at all.