What are common issues with the Audi A4 engine?

I have been experiencing some problems with my Audi A4 engine. What are some common issues that I should be aware of and how can I prevent them?

One common issue is carbon buildup in the engine, which can cause misfires and reduced performance. To prevent this, make sure to regularly service your car and use high-quality fuel. It is also recommended to use fuel additives that specifically target carbon buildup.

Another common issue is oil consumption, which can be caused by faulty piston rings or valve seals. To prevent this, regularly check your oil levels and replace any worn out parts as needed. It is also important to use the recommended oil type for your Audi A4.