How can I improve my Audi 80's fuel efficiency?

I recently purchased a used Audi 80 and noticed that it's not as fuel efficient as I expected. What steps can I take to improve its mileage?

One way to improve your Audi 80's fuel efficiency is to regularly maintain and change the air filter. A dirty air filter can decrease fuel efficiency by up to 10%. Make sure to replace it every 12,000 miles.

Another important step is to keep your tires properly inflated. Under-inflated tires can decrease fuel efficiency by up to 3%. Check your tire pressure every month and make sure it matches the recommended pressure in the owner's manual.

Consider changing your driving habits to improve fuel efficiency. Avoid sudden accelerations and braking, as these actions can waste fuel. Also, try to maintain a consistent speed while driving on the highway.