The story behind BMW's unique quad-turbo diesel engine, its impressive performance, and how it stacked up against its rivals ...

Cummins engines have earned a bit of a cult following over the decades — and for good reason. In the U.S., they're the iron workhorses found in everything from pickup trucks to massive semis, and they ...

In 2016, BMW unveiled its 3.0-liter inline-six quad-turbo diesel engine. The story behind it isn't quite as important as where BMW got its brand name from, but the B57S (or B57D30S0, as it was ...