What can I do to improve the performance of my Ford Focus engine?

I recently bought a used Ford Focus and I'm having some issues with the engine performance. It seems to struggle when accelerating and overall feels sluggish. Is there anything I can do to improve its performance?

First of all, make sure you're using the correct grade of fuel recommended for your Ford Focus. Using the wrong fuel can greatly impact the engine performance. You may also want to consider getting a tune-up, which can help improve the efficiency of your engine.

Check your air filter and replace it if necessary. A clogged air filter can restrict airflow to the engine, resulting in poor performance. Additionally, have your oil changed regularly as dirty oil can also affect the engine's performance.

Consider upgrading your spark plugs to high-performance ones. This can help improve the combustion process and give your engine more power. Also, make sure your tires are properly inflated as under-inflated tires can have a negative impact on performance.