How do I improve my Audi A4's MPG?

I've noticed that my Audi A4's fuel efficiency has been decreasing over time. What can I do to improve its MPG?

One way to improve your Audi A4's MPG is to regularly check and replace your air filter. A clogged air filter can decrease fuel efficiency by up to 10%. Also, make sure your tires are properly inflated as under-inflated tires can also affect MPG. Keep up with regular maintenance and use high-quality fuel for the best results.

Another tip is to reduce your speed while driving. Driving at a consistent speed of 55 mph instead of 70 mph can increase your MPG by up to 20%. Avoid quick accelerations and decelerations as well. Additionally, removing unnecessary weight from your car, such as a roof rack or heavy items in the trunk, can also improve fuel efficiency.