Here's the story on that.
This is actually my second replacement turbo. I had to return the first one because it was not producing any boost at all. Not sure what was wrong with it but the car would not go faster than 25mph. This was actually a good thing in disguise because I did multiple oil changes with this turbo. The first was was before it was installed, then again after it was pre-lubed and I idled it for a few minutes, then the last was after the first test drive when I realized it was faulty.
So the first oil change there was definitely some metal dust in the oil. The second one I couldn't tell if there was any or not, so I changed it one more time to make sure. The oil filters were changed each time as well.
So any metal dust that was in the oil went through the first, faulty turbo.
I'm a little paranoid right now about oil starvation and have read some people bypass the stock oil feed from the head. Does anyone have any opinions on this and if positive any suggestions on kits?