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 ...

When Ford launched the 6.4L Power Stroke V-8 diesel engine in 2007 as part of its F-Series trucks, Ford enthusiasts expected it to be unlike its predecessor, the 6.0L Power Stroke. Although Ford ...