Why is the Ford Fiesta's fuel consumption increasing?

I've noticed that my Ford Fiesta's fuel consumption has been steadily increasing. What could be causing this and how can I improve it?

It's important to regularly check and replace your air filter as a clogged one can increase fuel consumption. Also make sure your tires are properly inflated and consider using a fuel additive to improve efficiency.

I had the same issue with my Fiesta and it turned out to be a faulty oxygen sensor. Getting it replaced significantly improved my fuel economy.

Have you recently changed your driving habits? Accelerating and braking aggressively can increase fuel consumption. Try to maintain a consistent speed and avoid unnecessary acceleration.