I missed it the first time, but I just finally caught this little tid-bit of info. You know, I'm not too happy about that.
If I'm reading it right, it says that when you run out or urea, you're limited to 50mph, and if you continue to run without urea for more than 200miles, your truck is disabled and idled.
That's bullsht.
I doubt it will last long though...wait for the first time someone has an emergency and they sue because their truck wouldn't let them drive it.