How can I improve my Ford Focus' engine performance?

I have a Ford Focus and I want to make sure my engine is performing at its best. Are there any maintenance tips or performance upgrades I should consider?

Regular oil changes and air filter replacements can significantly improve your engine's performance. You may also want to consider upgrading your spark plugs and ignition system for better fuel efficiency.

Make sure you are using the correct fuel for your engine. Premium fuel may provide better performance, but it's important to consult your owner's manual to determine the best fuel type for your specific Ford Focus model.