A quick google.
Diesel exhaust fluid - Wikipedia, the free encyclopedia
This will be my third vehicle with urea. It's easier to use then you might think. Really, requires little to no extra effort.
In my 2011 F250, I had to fill about once every 7K miles.
In my 2011 BMW (yes, they have a diesel car) it's about once every 8-9K miles.
As for oil changes...it ain't rocket science. Drain old...add new filter...add new oil