How to properly maintain the Vauxhall Insignia's engine?

I recently bought a used Vauxhall Insignia and I want to make sure that the engine is properly maintained. What specific maintenance tasks should I regularly perform and what are some warning signs that may indicate a problem with the engine?

Regularly check and change the engine oil according to the manufacturer's recommended intervals. This will ensure that your engine is properly lubricated and protected against wear and tear.

Be sure to check the coolant level and condition regularly. Low coolant levels or coolant that appears dirty may indicate a leak or contamination, which can lead to overheating and engine damage.

Check the air filter and replace it if it is dirty or clogged. The air filter helps keep your engine running smoothly by preventing dust and debris from entering the engine.

If you notice any strange noises or vibrations coming from the engine, it may indicate a problem. Have a mechanic check it out immediately to avoid potential costly repairs.

In addition to regular maintenance, drive your vehicle smoothly and avoid harsh acceleration and braking. This will help prolong the life of your engine and improve fuel efficiency.