[RESULTS!] Provent 200 Catch Can - does it stop manifold gunk?? 40,000km road test!

Does the Provent 200 catch can ACTUALLY stop your manifold gunking up?? If you're thinking of buying a catch can to stop manifold gunk, this is essential viewing!
This is a follow-up video to a test I did at 18,000km on the same set-up, showing what's changed in the manifold after another 20,000km and how effectively the catch can's working at getting rid of oil.