How do I improve the fuel efficiency of my Audi A8?

I recently purchased an Audi A8 and I noticed that the fuel efficiency is not as good as I expected. Are there any specific ways I can improve it?

Regularly check and replace your air filter to ensure proper air flow and fuel combustion.

Avoid aggressive driving and maintain a steady speed to save on fuel consumption.

Try using a higher quality fuel or adding a fuel additive to improve fuel combustion.