How to maintain the Audi A7's fuel efficiency?

I've noticed that my Audi A7's fuel efficiency has been decreasing recently. What maintenance steps can I take to keep it running efficiently?

One of the most important things you can do to maintain fuel efficiency is to regularly change the air filter. This keeps dirt and debris from clogging the engine and causing it to work harder.

Keeping your tires properly inflated can also make a big difference in your fuel efficiency. Check them regularly and make sure they are inflated to the manufacturer's recommended pressure.

Have you tried using premium fuel instead of regular? While it may cost a little more, the higher quality fuel can improve your car's performance and fuel efficiency.