I'm looking into buying a low mileage 2016 TDI. Reading this forum it sounds like a pain in the butt. Some people report needing to add AdBlue every 3000 miles or so. (This sounds like an oputlier though.) More troubling, there seems to be an issue around cold start at temp even as warm as 20 degrees f? I mean that's cold, but certainly not frigid or unusual for the fairly moderate Mid Atlantic U.S. It seems to me that at a minimum we want our vehicles to start every time, Then there's the reports that the vehicle warms up more slowly than the gasser on cold mornings increasing the frigid factor. .Yet the TDI's are very popular. What gives?.