The feds aren't scrapping DEF altogether, but this could potentially address a large portion of emissions system failures.

Diesel engines lack the spark of gas engines, both literally and figuratively. They don't need a spark plug since they ignite the fuel using only compression, but also lack the 'je ne sais quoi' that ...

Any certified gearhead knows that diesel engines do not use spark plugs. But why not? If power in an engine is created by combustion or explosion of flammable liquids, won't a spark plug in a diesel ...

According to the BBC, the U.S. market for diesel passenger cars "has been historically very small." This is because diesel engines are more expensive and known to produce higher nitrogen oxide ...

Finnish manufacturer Wärtsilä introduced an engine back in 2015 that was so good, it snagged a Guinness World Records title for being the most efficient four-stroke diesel engine shortly after its ...

Detroit Diesel has produced many classic engines, but the "Screaming Jimmy" two-stroke is likely the one with the most ...

While Mercedes-Benz, like most automakers, is now shifting toward downsized, electrified powertrains, the German marque introduced the 2.1-liter turbodiesel OM651 diesel engine almost two decades ago ...