When I had my Mustang with a ProCharger, I would get the same thing in the Winter. I caught it all in the catch can and had to empty it once a week. My commute to work was 35 minutes and it still did this. I setup 2 catch cans just to make sure none of it was reaching the supercharger.

https://farm9.staticflickr.com/8080/...c05069_z_d.jpg

https://farm9.staticflickr.com/8364/...cb2986_z_d.jpg