Why is my Volkswagen Polo's gas mileage so low?

I just bought a used Volkswagen Polo and I noticed that it's gas mileage is lower than what was advertised. What could be causing this and how can I improve it?

There could be several reasons for your low gas mileage, such as an issue with your fuel injectors or a dirty air filter. It's best to take your car to a trusted mechanic to get it inspected and properly diagnosed.

Have you tried adjusting your driving habits? Avoid sudden accelerations and maintain a steady speed. Also, make sure to regularly maintain your car with oil changes and tire rotations for optimal gas mileage.

It could also be helpful to track your gas mileage and calculate if you're getting the expected range for your car. If not, consider switching to a different fuel type or upgrading to a more fuel-efficient model.