How can I properly maintain the engine of my Volkswagen Passat?

I just purchased a used Volkswagen Passat and I want to make sure I am taking the necessary steps to maintain the engine. Any specific tips or advice?

Regular oil changes and using high-quality oil are key to keeping your engine running smoothly and efficiently. Make sure to also check your oil level and top off as needed.

Keep an eye on your coolant levels and make sure to flush and replace it at the recommended intervals. This will help prevent engine overheating and potential damage.

Don't forget about regularly replacing your air filter. A dirty air filter can negatively impact your engine's performance and fuel efficiency.

Consider using a fuel system cleaner every few thousand miles to prevent buildup and keep your engine running smoothly.

If you notice any unusual sounds or vibrations coming from your engine, don't ignore it. Have it checked by a certified mechanic to catch any potential issues early.