How can I improve the fuel efficiency in my Audi A8?

I have noticed that my Audi A8 consumes a lot of fuel. What are some tips or modifications that I can make to improve its fuel efficiency?

Maintain proper tire pressure to reduce rolling resistance and increase fuel efficiency.

Avoid aggressive driving and try to maintain a steady speed on the highway to improve fuel economy.

Consider installing a cold air intake system or a performance chip to optimize your car's fuel efficiency.