Fiat Chrysler diesel vehicles spewed pollution as much as 20 times the legal limit, according to testing by the same researchers who first recorded the excess emissions in Volkswagen AG’s diesel cheating scandal. The revelation from a West Virginia University laboratory sheds new light on the U.S. Justice Department’s allegations in a civil lawsuit last month that Fiat Chrysler Automobiles has used illegal "defeat devices," software that helps evade emissions tests. It comes amid growing concerns about the ability of diesel engines to satisfy U.S. emissions limits and the extent to which automakers may be working to navigate around them.
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