You should discover where they connected it...it shouldn't be full of oil. They should've installed a "T" for it up near the hpfp(@ "R" of the intake manifold). Located in step one on this pdf: http://bd8ba3c866c8cbc330ab-7b26c6f3e01bf511d4da3315c66902d6.r6.cf1.rackcdn.com/VW_MKV_GTI_FSI_ECS_Tuning_Vent_Pod_Vacuum_Boost_Gauge_Installation.pdfIf it was connected to the crankcase ventilation...you will get oil. A proper boost tap connected to the CC ventilation may have helped prevent this.