Not gonna get any panties bunched up (well...not mine at least)...
The whole gas thing is honestly very confusing if you really look at it.
As an example....
1. Higher octane gas is higher in density...so good right? More bang for the buck...err...unless you are in a higher altitude...in which case you need a lower density to compensate for the thinner air.....hmm...so air density matters.
2. Ethenol and blends. I seem to remember a number around 80 (to lazy to look it up so whatever)...80ish different blends and formulations of gas in the U.S.....how can it be that they would all produce the same results/performance? Idk.
3. The engine...yours is still a bit "young" and subject to change...older engines can have carbon buildup that changes the compression ratio of the engine and as a result can benifit from a higher octane....but when do those trigger points happen? When is an engine truly broken in? When is it "old"? Was the guy that built it shooting jack black as he put in parts and what affect will that have on the numbers?
4. The gas station. How do you know that the gas your buying meets the stated octane? There was an undercover study on this....Fk don't ask me who, I just know I watched it on tv so it must be true...probably 20/20 or something similar...they went around buying and testing gas....guess what...it didn't always meet the stated octane rating.
5. And if 4 is true that means knock sensors would kick in and adjust the engine resulting in lower performance....BTW...does the jk have I knock sensor? I have no idea.
6. The gov says there is zero benifit to running a higher octane gas unless the engine was
designed for it...ie high compression.
7. See 1 through 5 and mix in driver reports like the OP which can be found again and against and again....
8. Eight was gonna be about real world testing and crap like tail winds, tire pressure, air temp, road conditions, tilt of the earth, global warming, and general attitude in regards to test variables but fk it I really don't feel like opening that bag.
So uhhh yeah....confusing to say the least.
Bottom line? I'm posting cause I'm bored. Also...Congrats on the increase! I would simply suggest that given all of the well thought out points above that other drivers may not experience the same results. I'm not suggesting that you are incorrect...I'm simply suggesting that given the variables each and every one of us will have to figure out what works best for us given our specific jeep, driving habits, environment, and gas blend.