How do you properly maintain the engine of a Ford Fiesta?

I have been driving my Ford Fiesta for a few years now and I want to make sure I am properly maintaining the engine in order to avoid any costly repairs. Can anyone offer any tips or advice on how to keep the engine running smoothly and prolong its lifespan?

Regularly check the oil level and change it every 3,000-5,000 miles. This is crucial for keeping the engine lubricated and running smoothly.

Make sure to use the correct type of fuel for your engine. Using lower octane fuel can cause damage over time.