What causes poor fuel efficiency in the Audi A5?

I recently purchased a new Audi A5 and noticed that I am not getting the advertised fuel efficiency. Is there something specific that could be causing this issue?

There are a few factors that could contribute to poor fuel efficiency in your Audi A5. Make sure you are using the recommended type of fuel and regularly check and replace your air filter to improve engine performance. It's also important to follow proper driving techniques, such as avoiding speeding and excessive idling.

Another potential cause could be a malfunctioning oxygen sensor. This device monitors the amount of oxygen in your vehicle's exhaust and helps regulate the fuel-to-air ratio. A faulty sensor can lead to an incorrect fuel mixture, resulting in poor fuel efficiency.

I would also suggest checking your tire pressure regularly. Under-inflated tires can increase resistance and cause your car to work harder, resulting in lower fuel efficiency. Keep your tires properly inflated to ensure optimal performance.