I changed the oil in my 2006 Mustang GT so I decided to check the UPR Billet Catch Can to see how much oil was in it. I installed it the last time I changed the oil (maybe 5,000 miles?) so I wasn't sure what to expect. It's been about four months or so... Needless to say, I was pretty shocked to see that it trapped this much oil. UPR For The Win!