Why is my Audi A6's fuel consumption increasing?

I have noticed that my Audi A6's fuel consumption has been gradually increasing over the past few weeks. What could be the reason for this and how can I improve my car's fuel efficiency?

There could be a variety of reasons for your car's increased fuel consumption. Firstly, check your tire pressure as under-inflated tires can lead to greater resistance and therefore higher fuel usage. Another common issue is a clogged air filter, which can cause your engine to work harder and use more fuel. It's also worth considering your driving habits - aggressive driving and speeding can significantly impact your fuel efficiency. Make sure to maintain regular maintenance and tune-ups for your car as well.

As an Audi certified mechanic, I would recommend checking your fuel injectors. If they are clogged or dirty, they can cause your car to use more fuel. Additionally, make sure you are using the recommended fuel grade for your car. Using a lower grade can also result in increased consumption. Finally, if you have recently changed your driving routine or added extra weight to your car, this could also affect your fuel usage. Keep these factors in mind and make any necessary adjustments to see an improvement in your car's fuel efficiency.