I put a Billet Technologies PCV "Catch Can" on my 6.1 Hemi. So far I've collected 80 Ml of oil (1/3 cup) in 4000 miles. This is 80 ml of oil that did not get into my intake and deposit on my intake valves.
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2015 BMW K1600 GTL