The amount of oil passing through the PCV system can be quite a bit. When you consider its always there no matter when you do an oil change. The oil in the PCV line is not "clean" engine oil it is contaminated. As the oil enters to intake manifold it fouls the quality of the air used mixed with fuel and is reported to lower the octane rating of fuel decreasing fuel economy.
In the SIDI engines the oil residue in the intake manifold works its way to the back of the valves and is caught there where it burns and can create other issues which could be costly to rectify. This issue is believed to be not as much an issue with older VE V6 engine (LLT) and GEN4 as the valves have some fuel over spray behind them to clean the PCV oil residue off.
I am not sure about the PCV system being designed to lube anything, not sure I'd want that oil lubing anything other than going back into the sump.
OPPs,,, to slow at typing, someone before me has said the same thing.... anyway !!!
Here are some of the hose you need to place the catch can.