S197 team i have been monitoring my 2013 GT500 for some time and noticed that the nGauge reads knock very often but only in 4th and 5th gear at a very low load. Anything from .25 to 5 degrees specially in 4th gear at 2K rpm. While cruising is all fine, it starts reading once i slowly press the gas pedal and start climbing up in revolutions. All very light and slow climb until it hits 2,500 or 2,600 rpms and stops reading any knock. Some times it also reads in 5th gear around the same 2K rpm. If I am in 4th gear and start gassing up the car and reads knock i let off a little then back on it and it wont read any more knock then i can gas it harder past 50% throttle and is mostly fine. I use boostane in every fill of 93 octane to up it to around 97 octane. Change the plugs on every oil change TR6 gapped first at .032 and now to .035. I will next do a full exhaust check and anything else that could be touching or tapping around but doubt ill find anything, i have been under the car many times and it all looks good. Anybody has experience anything similar? I just want to see if i have to baby this car to ensure the engine last until i can finish current upgrades before any build.