What's the best way to improve fuel efficiency in an Audi A3?

I've noticed that my Audi A3's fuel efficiency is not as good as it used to be. Are there any tips or tricks to improve it?

One way to improve fuel efficiency is by regularly maintaining your car. This includes keeping your tires properly inflated, changing your air filter regularly, and using the right oil for your engine. Additionally, avoiding aggressive driving and planning your routes ahead can also help save fuel.

Another tip is to make sure your fuel injector is clean. A dirty fuel injector can often lead to poor fuel efficiency. You can either use a fuel injector cleaner or take your car to a mechanic to have it professionally cleaned.

It's also important to avoid carrying excess weight in your car. The more weight your car has to carry, the more fuel it will use. So make sure to remove any unnecessary items from your trunk or backseat.