Great report! I've got a bottle of Rotella Gas Truck on deck for my JL 3.6. It is currently on a run of Mobil 1 AP and is at about 6500 miles with the OLM at 23%. I'm taking her to zero and then will do the change. I snagged the RTG on clearance at Autozone for 10 bucks, minus the rebate, and minus the 10 bucks with a rewards card, so it was free. I'll use a Mobil 1 filter that I grabbed for $4 on clearance at Wallyworld awhile back, so this will be a $4 oil change with top quality stuff!
I agree with you that this new gen 3.6 is someting special. It is super smooth, pulls hard, and sounds GREAT with a Magnaflow axle back exhaust. I couldn't be happier with it.