I had to laugh at the Green Diesel Engineering guy's comment (in the CRD Section here) on the entry of Mahindra to the US market - as apparently in the deterioration factor testing Mahindra has to deliver emission systems that provide:
"lean-NOx traps, SCR (urea injection) and diesel particulate filters (DPF), it is not a surprise that Mahindra is having difficulties".
Urea Injection, what will the EPA require next? As it's the main nitrogen-containing substance in the urine of mammals, perhaps all new cars with come with a catheter to be inserted in your old fellow for direct injection!
Here is the link to the full post:
viewtopic.php?f=5&t=51687&p=575739#p575739