anyone have problems with their valves tapping on v6? i turned off my radio one day and noticed the valves tapping. you can really hear them around 3000 rpms. i checked my oil and it was below the marking but not too bad. im going to change my oil tomorrow and see what happens. i run 5-40w synthetic oil. the oil light never went on yet. could i have messed up any anything. anyone have this problems or got any repairs done? can it be covered on the 10/100k warranty. i have my maintenance book filled out along with some but not all reciepts.