We have encountered a problem with the boosted engines in the Solstice, Sky and Opel GT. Oil residue shows up in the intake tracts over time and this residue starts to work its way through the turbo, into the intake pipes and intercooler. As the oil coats the inside of the intercooler, performance starts to decrease. Also this residue can build up on the MAF sensor (2.4L) or the MAP sensor (2.0L). The factory did try to integrate a way to catch this oil in the 2.0L cars into the valve cover, but we still see the oil residue on even stock cars.
What we came up with to resolve this problem is a simple catch can made specifically for the cars, that bolts in using stock bolts. The box is packed internally with stainless steel mesh to help the oil collect, and with a huge capacity of almost 3/4 quart, you will not need to empty the can very often. The integrated sight glass on the catch can will let you know when it is getting full and the removalable drain plug allows simple draining.