I find this interesting @
MrDinkleman because a few years ago, at 40k miles, I specifically remember hearing a vvt rattle, or some kind vibration and knocking sound when hovering at 3400 rpm in 3rd gear. It happened on only two occasions after leaving the highway from long trips and during normal cruising, and after that never happened again! Perhaps something wearing in like timing chain tensioners? Or perhaps AVCS doing some sort of "programmed systems testing" nearing the end of the drivetrain warranty? :thinking emoji"