Golf VI R :: Smoke From Exhaust On Cold Start

At cold start (car sitting at least 8 hours), and the first block or so of driving, I have been getting smoke from the exhaust. I am not 100% certain whether to describe it as black or blue. If I start and idle the car, the smoke continues until I start driving.

After warming the car up, I have tried letting the car sit and idle for an extended period (over 5 minutes), and the smoke does not reappear.

Background;

- APR Stage 3 car, 17,700 miles

- On a particularly cold night this winter, the BFI clean catch did freeze up, and the car started blowing smoke. I removed it for winter and re-installed recently.

- Oil change with Rotella T6 and Mann filter 700 miles ago; the level when warm is at Max level

During the winter, it is hard to say whether this issue was happening. I noticed the issue some time after changing the oil, so I am wondering if the oil level may be slightly high. I changed the oil around the time the weather started consistently staying above 40F, though, so it could be coincidence.

I tried to come up with what the cause could be. What I was thinking (in order of easy to difficult);

- It's normal! The weather is warm, and the fuel trims have not adjusted yet, so it's running rich at start-up.

- It's normal! Typical 2.0T stuff.

- It's a catch can problem. Troubleshoot by removing it and seeing if the smoking stops.

---> Catch can is NOT full. I check it at least once per week.

- It's a turbo problem. The catch can freezing overpressurized the turbo lines and blew a seal

---> Although my experience has been that idling the car should bring the smoke back in this case, which I haven't gotten it to do.

- It's an engine problem.