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               Originally Posted by 
               Gas_Up_Lets_Go 
                
               
             
              As an aside, I have a new car with a Euro 6 engine.... they meet these standards by injecting Urea into the exhaust before the Cat !!
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         PSA Group diesel engines (Peugeot, Citroen, Ford, Jaguar and Land Rover) have relied on urea to regenerate their catalysts for nearly ten years.