For decades, diesel vehicles have had a reputation as loud, smelly, polluting cars. Their one saving grace was that they went farther on a gallon of fuel. But now with new, cleaner diesel fuel and ...

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 ...

In a move being hailed as one of the most significant clean-air upgrades since lead was removed from gasoline decades ago, a new blend of ultra-low-sulfur diesel fuel is on its way to pumps in the ...

The increasing market acceptance of advanced clean diesel technology heavy-duty trucks and passenger vehicles will play a major role in helping California achieve future fuel savings and climate ...

EPA required a 97-percent reduction in the sulfur content of highway diesel fuel from its pre-2007 maximum of 500 parts per million (low sulfur diesel, or LSD) to 15 parts per million (ultra low ...