Hello,
I have a 2000 JGC with about 140M on it. Be careful about using the oversized oil filter. There is a smaller Motorcraft that I use, and several others here and on Jeep forums, it is the FL400S. It uses less oil than the OEM filter, but gets rid of the start-up knock very well, and I use it on 6-8 month OCI, about 4000 miles.
Also wanted to add that I recently tried 5W30 Castrol GTX HM in my F150 V8, and it felt like the engine was 5 years newer. Now I cannot explain how they do it, but I will be using the 10W30 wt. in the Jeep 4.0 this month. Not sure how it can be so thick at temp, yet feel so smooth and quiet. Castrol is on to something here. (I have no connections at all with Castrol)
VW