How to properly maintain your Audi engine?

My Audi engine seems to be making weird noises, what could be the cause of this and how can I properly maintain it to prevent further damage?

One possible cause of the weird noises could be low engine oil level. Make sure to regularly check and top up your engine oil as needed. Also, make sure to follow your vehicle's maintenance schedule for oil changes and use the recommended oil type.

Another possible cause could be a loose or worn drive belt. Check the tension and condition of the drive belt and replace if necessary.

It could also be an issue with the fuel injectors. Have them checked and cleaned by a certified mechanic if needed.