How can I increase the fuel economy of my Volkswagen Polo?

I recently noticed that my Volkswagen Polo's fuel economy is not as good as it used to be. Are there any tips or tricks to improve fuel efficiency?

Regularly check and replace air filters. A clogged air filter can decrease fuel efficiency. Make sure to replace it at least every 12,000 miles.

Avoid aggressive driving and excessive idling. This can greatly impact fuel efficiency.

Keep your tires properly inflated. Under-inflated tires can decrease fuel efficiency.

Consider using a fuel injector cleaner. It can help improve performance and increase fuel efficiency.