Why is my Audi A5's fuel consumption increasing?

I've noticed that my Audi A5's fuel consumption has been increasing lately. I've been following the recommended maintenance schedule and driving conservatively, so I'm not sure what could be causing this. Any ideas?

There are a few possible reasons for your increased fuel consumption. First, check your tire pressure and make sure they are properly inflated. Under-inflated tires can cause your car to use more fuel. Also, have you recently changed your driving habits? Aggressive driving and constant stop-and-go traffic can also lead to higher fuel consumption. In addition, if your spark plugs are dirty or worn out, they may not be able to ignite the fuel efficiently, resulting in higher fuel consumption.

Another factor to consider is the type of fuel you are using. If your Audi A5 requires premium fuel and you've been using regular, this could be contributing to higher fuel consumption. Premium fuel has a higher octane rating, which can improve engine performance and fuel efficiency.