I have a 2013 Chrysler 300 5.7 with 121,000 on it. The oil has been changed every 3500 to 4000 miles at the dealer. I just took my son back to collage this past weekend and the engine started to have top end noise (taping ,ticking). I did not take the valve cover off yet, But from what I have read on this seems to be bad lifter and cam issues.