I guess gone are the days when the owners manual states actual miles between suggested oil changes! I bought a 2019 Jeep Cherokee Trailhawk to tow behind my RV. I went to the owners manual to see what they suggested on Miles between oil changes and IT IS NOT LISTED!!!!! Not anywhere in the 1" thick owners manual! It says to look at the onboard heads up display for notification of oil change due. When you look at that, it simply has a % as an indicator of "oil life left". It then goes on to say basically how you use the vehicle has a lot to do with when to change oil but still no actual numbers listed. I can just see going to a dealer with a blown engine and them DENYING warranty because you didn't change the oil often enough!