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 ...

"There's no replacement for displacement!" This has been the battle cry of big block fans everywhere, and for good reason. A Chevy big block brings the thunder, whether you're roasting tires with a ...

Problem rates for heavy-duty truck engines manufactured with emissions controls implemented in 2004 and 2007 are nearly twice as high, on average, as rates for engines built prior to these emission ...