What is the best way to improve the performance of a Ford Fiesta engine?

I've noticed that my Ford Fiesta's engine isn't performing as well as it used to. What are some steps I can take to improve its performance? Any advice on maintaining the engine?

One of the easiest things you can do is to regularly change your engine oil and filter. This helps keep the engine running smoothly and can improve performance.

Another important factor in engine performance is air flow. Make sure to properly maintain your air filter and consider upgrading it to a high-performance one.

Don't forget to regularly check and maintain your spark plugs. These small components play a big role in your engine's performance.

If you're looking for a significant improvement, consider installing a cold air intake system. This can increase air flow and result in better engine performance.