Why is it important to regularly change the engine oil in a BMW 3 Series?

I recently purchased a used BMW 3 Series and I am wondering how often I should change the engine oil. It seems like a hassle and an unnecessary expense.

Regularly changing the engine oil in your BMW 3 Series is crucial for maintaining its performance and longevity. BMW recommends following their oil change schedule, which is typically every 10,000 miles or once a year, whichever comes first.

Not changing the engine oil in your BMW 3 Series may lead to a decrease in its performance and even potential engine damage. It is a small expense compared to the cost of repairs for neglecting it.