I persinally think you are all juat being picky unless you have a reason to be worried about engine noise
. If it is extremely loud like when a piston knocks then yeah.
I hear all sorts of stuff in and out of my car and its only at 7500 miles. Everything is working fine as well. Nissan ester oil in engine, redline in tranny and diff. Motul fluid in clutch system. I hear tapping noises, transmission noises, you name it.