How to improve the fuel efficiency in my Audi A8?

I recently purchased an Audi A8 and I am concerned about its fuel efficiency. Is there anything I can do to improve it?

First and foremost, make sure you are keeping your car well-maintained. Regularly check and replace your air filter, spark plugs, and tires. This can greatly impact your fuel efficiency.

Another tip is to avoid excessive idling. If you know you will be stationary for more than a minute, it's better to turn off the engine. Idling uses up fuel unnecessarily.

Driving at a consistent speed on the highway can also help improve fuel efficiency. Avoid frequent accelerating and braking as it can use up more fuel.