13. BMW M54 Inline-Six
The BMW M54 inline-six engine, found in the 3 and 5 Series, is celebrated for its silky power delivery and impressive longevity.
With regular maintenance and timely attention to cooling system components, the M54 is known to deliver a long service life, often exceeding 200,000 miles.
According to BMW Blog, this engine exemplifies the classic BMW driving experience and remains a favorite among enthusiasts for its balance of reliability and performance.