Every quality survey I get I mention this issue. They call me. I tell FCA their 3.6 has a detonation problem. They say see the dealer. Dealer says its normal.
I asked for an extended warranty since theres no fix. FCA said no, see the dealer.
Spin, deny, stonewall, the FCA way.
A great way to improve reliability is to never use the dealerships service.
I've had a JK and JL with few mechanical issues and don't use dealerships service.
Family members had a Hemi GC and new Cherokee and guess what, problems that I 100% attribute to dealer techs rushing jobs and not...
i ended up going with the Warn VR EVO 10K winch with the warn winch plate for my JLUR. its Warns chinese made model.
only thing i dont like is the control pack wires stick out the side and dont have the clean seamless look of the Zeons.
There are many reports of the JL 3.6 having predetonation issues with lower octane. Several threads about it here. There's no fix from FCA. They say it's the normal and the dealers are useless.
It would be interesting to test. I thought going to 37s would force the engine to work harder and hold higher rpms but basically in gears 1 through 5 I don't notice any difference. On the highway it'll hold 6 and 7th more often than 8th.
K02s are a great all around tire and fine for highway. That said I recently went to a mud terrain in 37 inch size and find them acceptable also for daily driving, about 50 miles per day. Maxxis Razr MT.