How do I properly maintain the engine of my BMW 3 Series?

I've noticed that my BMW 3 Series engine has been making strange noises and has been running less smoothly than before. What are some steps I can take to properly maintain the engine and keep it in top condition?

To properly maintain your engine, it is important to regularly check and change the engine oil, replace the air filter, and keep an eye on the engine coolant levels. You can also consider adding a fuel system cleaner and using high-quality gasoline to keep your engine running smoothly.

Additionally, make sure to follow the recommended service schedule for your BMW 3 Series and take it to a certified mechanic for any necessary repairs. It's also important to be mindful of how you drive your car and avoid harsh driving habits that can put unnecessary strain on the engine.

Lastly, don't forget to regularly check the belts, hoses and other components under the hood to ensure they are in good condition. By taking these simple steps, you can prolong the life of your engine and keep your BMW 3 Series running at its best.