How do I properly maintain the engine of my Vauxhall Astra?

I am hoping to keep my Vauxhall Astra running smoothly for as long as possible. What steps should I take to ensure proper maintenance of the engine?

Regularly check and change the engine oil according to the manufacturer's recommendations.

Make sure to also monitor the coolant levels and change it as needed to prevent overheating.

Don't forget to inspect and replace the air filter periodically to keep the engine running efficiently.

In addition, consider using fuel additives to keep the engine clean and prevent buildup.