Since launching in 1992 as a replacement for the 6.2 diesel V8, the 6.5-liter GM Detroit diesel engine has had good years and bad years, and opinions on its merits have been just as mixed. Some view ...

Diesel engines, for all their rugged usefulness, can be tremendously polluting. They produce more NOx — nitrogen oxides-based emissions – than gasoline-fed cars, as well as more particulates, aka soot ...

A popular argument in the heavy-duty pick-up truck segment - where big names like the Ford F-250 Super Duty and Chevrolet Silverado 2500HD do battle - is Cummins versus Duramax, and who reigns supreme ...