The rules require diesels to emit 82.5 percent fewer oxides of nitrogen, or NOx, cutting it to 0.035 grams per ...

While diesel-powered passenger vehicles are increasingly limited in the U.S., they remain vital, especially for those in the ...

One company thinks it has the answer for truck operators that want to use natural gas but are concerned about range issues: a dual-fuel system that can be retrofitted to existing diesel engines.

Detroit’s new DD5 diesel is a 5.1L engine designed for urban delivery/service applications in Class 5-6 Freightliner M2 106 trucks. Photos: Jack Roberts Take a glum Midwestern sky, add a hefty helping ...

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 ...