Why is my Audi A6 producing excessive smoke from the exhaust?

I've noticed that my Audi A6 has started producing excessive smoke from the exhaust recently. I'm concerned about the possible causes and how to resolve this issue. Can anyone provide some insight?

It is possible that your Audi A6's engine is burning oil, which can cause excessive smoke. This could indicate a leak or an internal issue. It's best to have a professional mechanic diagnose and fix the issue as soon as possible.

Another possible cause could be a clogged catalytic converter. This can restrict the flow of exhaust and result in smoke. Have a mechanic check the converter and replace if necessary.