What is the best engine oil viscosity for an Audi A4?

I recently purchased a used Audi A4 and I want to make sure I use the correct engine oil for optimal performance and longevity. I am unsure of what viscosity to use and if it varies depending on driving conditions. Can anyone offer some guidance on this?

For an Audi A4, the recommended engine oil viscosity is typically between 0W-30 to 5W-40. This will vary based on the specific model and year of the vehicle, but it's important to stick within this range to ensure proper lubrication and protection for your engine.