How can I optimize the fuel efficiency of my Audi A8?

I've noticed that my Audi A8's fuel efficiency has decreased over time. Are there any steps I can take to improve it?

First, make sure your tires are properly inflated. Under-inflated tires can greatly decrease fuel efficiency. Second, regularly check and replace your air filter if necessary. A dirty air filter can also affect fuel efficiency. Lastly, avoid aggressive driving and try to maintain a steady speed on the highway.

I highly recommend getting your Audi A8's fuel injectors cleaned. Dirty fuel injectors can result in poor fuel efficiency. You can also try using a fuel additive specifically designed to improve fuel efficiency.

Another factor that can affect fuel efficiency is the weight of your vehicle. Make sure to remove any unnecessary items from your car to reduce its weight. Additionally, getting regular tune-ups can also improve fuel efficiency.