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Old 10-04-2012, 12:15 AM   #27
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Originally Posted by Focus YBTC View Post
They sure are, especially the torque figure combined with the fuel economy one. Diesels are another thing we don't get here for the most part either. I think that's because our gasoline has always been cheap and the fact that hardly any Americans think about CO2 emissions because it's not taxed here.
California emissions in particular are not kind to diesels. Diesels may emit less CO2 but at the same time they typically produce far more particulate matter and NOx emissions both of which are much more tightly controlled in the U.S. than they are in Europe where the diesel roams free in the passenger car.

They require expensive exhaust after treatment systems to pass the U.S. regulations, and the purging processes burn more fuel to clean up the exhaust. Mercedes, BMW and all the bigger truck diesels require selective catalyst reduction technology using urea injection to try and combat the NOx emissions. Only the smaller VW diesel had made it past the emissions testing without the full urea treatment, getting by with particulate filters/traps only.
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