To report back on my JLT (passenger side) oil catch can. I just checked it yesterday and after approx. 400 miles the can was about 20% filled. While I didn't expect that much oil with only 400 miles, very happy that's not being sucked back into the intake/valves/combustion chamber. The car doesn't appear to be burning any oil (I have about 900 miles on it to date) as the oil level is still showing right at full.