How to increase the fuel efficiency in an Audi A8?

I've been noticing that my Audi A8 is not as fuel efficient as it used to be. Is there any way to improve its fuel efficiency?

One way to increase fuel efficiency is to regularly maintain your car, including getting oil changes and checking tire pressure.

You can also try driving at a more consistent speed and avoiding sudden accelerations or decelerations.

Consider using a fuel additive or switching to a higher quality fuel for improved efficiency.