They're pointless, waste of time and money
I have catch cans on both my GT and V6 and I completely disagree with your statement.
Mind you I made them myself, so they weren't a waste of money. and the time spent to make them was definitely not a waste either. I realize that every time I open them and drain oil and water out of them. Anyone who knows anything about engines also knows that ANY amount of oil that can be kept out of the intake manifold and combustion chamber is a good idea. Because oil, doesnt belong there. Air and fuel do.
2011 GT. Grabber Blue. Procharged. 3:73 manual.Billit LCA's. Corsa Extremes. GT 500 wheels. Racemaster DR's. T-56 Tremec. Dynotech DS . Centerforce DF. American Racing headers/high flow cats 560 rwhp.Donny Walsh tuned
2012 Pony Package. Race Red.3:31 automatic.BBK longtubes and catted X.FRPP Sport axlebacks. BBK throttle body. Dynotech DS. Brembo wheels and tires. Strut tower brace. Airraid CAI. Bama tuned.