How do I properly maintain my Vauxhall Astra's engine?

I recently purchased a secondhand Vauxhall Astra and I want to make sure that I am properly taking care of the engine to ensure its longevity. Can you provide some tips on engine maintenance for this specific make and model?

Regularly check and change the engine oil and oil filter according to the manufacturer's recommended intervals. This will help keep the engine running smoothly and reduce wear and tear on its components.

Make sure to top up any low fluids, such as coolant and brake fluid, to keep the engine running at optimal temperatures and to maintain proper brake performance.

Keep an eye on the condition of your spark plugs and replace them if necessary. Faulty spark plugs can cause engine misfires and decrease fuel efficiency.

Don't ignore warning lights or unusual noises coming from the engine. It's best to have it checked by a professional to catch any potential issues early on.

Consider investing in a good quality engine cleaner and following the instructions to help keep the internal components of your engine clean and functioning properly.