Only a few good ones on the market and the RX has had a standing pull through test challenge for years and is still the most functional unless going to a $5-$12k centrifuge style industrial system.
The others well worth it are:
Saiku Micchi
Elite
AMW
Mike Norris/CCA
And thats about it. All others let so much oil past (allthough any trap is better than no trap) that I would not install one on my cars. The idea is to stop ALL oil ingestion, not just some.
