How can I improve the efficiency of my Ford Focus engine?

I recently purchased a Ford Focus and I'm looking for ways to improve its overall performance. Are there any modifications or upgrades I can make to my engine to increase its efficiency? I'm open to any suggestions.

One way to improve the efficiency of your Ford Focus engine is to install a cold air intake system. This will allow for a greater flow of cooler air into the engine, resulting in improved performance and fuel economy.

Another option is to upgrade your ignition system with high-performance spark plugs and ignition coils. This will provide a stronger spark and improve the overall combustion process, resulting in better fuel efficiency and horsepower.

Regular tune-ups and maintenance are also crucial for keeping your engine running efficiently. Be sure to follow the recommended maintenance schedule for your Ford Focus and use high-quality fluids and filters.