After sitting a while the car will blow smoke after start up. The longer it sits, the worse it smokes. I believe I have a turbo oil return line check valve problem. I have done some reading about the issue...

As I understand it, the earlier car (pre-2013??) problem was it didn't have the check valve in the oil return line to the turbo. Am I wrong in thinking that the 2015 should have it from the factory?

If I have the check valve, could it be sticking? Has there been any reports of the check valve failing?