How to properly maintain my Ford Focus's engine?

I recently purchased a Ford Focus and want to make sure I am properly maintaining the engine to ensure its longevity. Can someone provide some tips and advice on what I should be doing regularly? Thanks!

In addition to regular maintenance, I would also recommend using high-quality fuel and additives to help keep the engine clean and running smoothly.

Regular oil changes and keeping up with routine maintenance is key to keeping your Ford Focus's engine in top condition. Make sure to also check the air filter and spark plugs periodically.