What could be causing poor fuel efficiency in my Audi A2?

I've noticed that my Audi A2 has been consuming more fuel than usual. What could be the cause of this and how can I improve my car's fuel efficiency?

It could be due to a number of factors such as underinflated tires, dirty air filters or a faulty oxygen sensor. Make sure to regularly check your tire pressure and air filters and replace if needed. If the issue persists, it's best to take your car to a mechanic for a proper diagnosis.

Driving habits can also greatly affect fuel efficiency. Avoid aggressive driving, unnecessary idling and try to maintain a consistent speed while on the road. Also, make sure to avoid overloading your car with unnecessary items as this can increase fuel consumption.

It's also important to use the right fuel for your car. Using a higher grade of fuel than recommended can actually harm your car's fuel economy. Stick to the recommended fuel grade for your Audi A2.