predetonation

Hey all, I’ve got 30k on my 3.6 rubi, and I’ve noticed sometimes between 2nd and 3rd gear around 2k to 3k rpm, I’m getting what some are referring to as “spark knock”. No loss in power, just sound a little like a diesel for a couple turns. I’m running shell 91 and it seems to help and but. Has...

I know there have been several threads on this forum, but I don't see where anyone has found a solution. Did Jeep ever re tune the 3.6 pentastar to address the knocking some of us are getting under load? I have 2018 JL 3.6 Manual with 12000 miles. It has been knocking under load since day 1...