Originally Posted by
tonygg
It's not normal. Are you using high octane fuel? Timing could be an issue but the computer usually corrects any small differences. Both can cause "pinging".
I am using Premium (93). They said that it sounds like there is buildup from maybe not getting the best gas or just a "normal" buildup, and I should run some injector cleaner additive in my gas.
They told me today when I went to pick it up that there is an issue with the oil gasket leaking, and a rear axle seal is cracked (or something like that) so they are keeping it until tomorrow morning.
I will take a video of the sound and upload it when I get my car back. (hopefully tomorrow!)