EPA Sued by Navistar Again

Navistar is accusing the U.S. Environmental Protection Agency (EPA) of having certified competitors’ exhaust emission systems without determining if those systems work as intended under certain real-world situations, according to a lawsuit filed July 5 in the U.S. District Court for the District of Columbia.

The suit states that SCR-equipped engines - used by Navistar’s competitors to meet EPA-2010 emissions standards—require frequent replenishment with an essential fluid [DEF a.k.a. urea] and … “Those fill-ups are both expensive and inconvenient for the customers of SCR engine makers.” The suit also contends that whenever the DEF tank is empty, emissions rise “3 to 40 times.”


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