How to improve gas mileage in an Audi 80?

I recently bought a used Audi 80 and noticed that it doesn't get the same gas mileage as advertised. What can I do to improve its fuel efficiency?

Regularly maintain your car by changing the air filter, spark plugs, and oil. This will help your car run more efficiently and use less gas.

Consider driving at a steady speed and using cruise control on long trips. This can help improve gas mileage by preventing unnecessary acceleration and braking.