Possible reasons for poor fuel efficiency in an Audi A6

I recently purchased an Audi A6 and am noticing that it's not getting the fuel efficiency that I expected. What could be causing this issue?

One possible reason for poor fuel efficiency in your Audi A6 could be dirty fuel injectors. Over time, these can become clogged and cause your car to use more fuel than necessary.

Another common issue could be a faulty oxygen sensor. This sensor measures the amount of oxygen in the exhaust and helps regulate fuel usage. If it's not working properly, your car could be burning more fuel than needed.

It's also worth checking your tire pressure regularly. Underinflated tires can cause your car to use more fuel while driving.