What are the most common types of oil used in Audi vehicles?

I recently purchased an Audi and I want to make sure I am using the correct type of oil for my car's engine. Can anyone tell me the most common types of oil used in Audi vehicles and why they are preferred?

The most common types of oil used in Audi vehicles are synthetic oils, as they provide better engine protection and performance compared to conventional oils.

I use 5W-40 synthetic oil in my Audi because it meets the manufacturer's specifications and has better viscosity in extreme temperatures.

For my Audi, I prefer using a fully synthetic 0W-40 oil as it helps improve fuel economy and reduces engine wear.