Diesel power is a rarity in the motorcycle world. There have been only a couple of mass-market diesel motorcycles in history, and the chances of seeing a new diesel today are even lower as the world ...

Scientists are exploring a surprisingly simple way to clean up diesel engines: adding tiny droplets of water to the fuel. During combustion, the water rapidly vaporizes, triggering micro-explosions ...

No Soot: Margo Oge, the EPA official who spearheaded the clean diesel effort, shows off a spotless handkerchief that had been held over the exhaust of a Freightliner tractor lent for the occasion by ...

Introduction of more advanced diesel truck engines, innovative emissions control systems, and cleaner diesel fuel over the past decade has resulted in major improvements in air quality and fuel ...