Later this year we will finally begin to see an influx of new model diesels in the United States. While diesels make up 50% of the market share of vehicles in Europe, they’re still trying to shrug off the stigma of being dirty, noisy beasts here in the US. So what changed? In 2006, the EPA required the introduction of Ultra Low Sulfur Diesel (ULSD), which removed a major polluting component of diesel fuel. Since sulfur would damage advanced emissions control systems, ULSD paved the way for better emissions control technology.
As early as August, we will start to see a new era of diesels that employ new technology to meet the strictest emissions standards in the world—BIN5/LEV II—which are enforced by 5 US states: California, Massachusetts, Maine, New York, and Vermont. BIN5/LEV II standards severely cap nitrogen oxide (NOx) emissions (0.05 g/mile), one of the two tailpipe pollutants that have given diesels a bad rap (that and particulate matter).
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