Why is my Nissan 370Z's engine making a strange noise?

I've noticed that my Nissan 370Z's engine is making a weird noise. It's not very loud, but it's definitely not a normal sound. What could be causing this and should I be worried?

It could be a sign of a loose or worn-out belt in your engine. Have a mechanic check it out as soon as possible.

If you recently had your oil changed, make sure the correct oil weight was used. Incorrect oil weight can cause abnormal sounds from your engine.