No Can 192K Ecotec3 V6
Just had the intake manifold off Pepper for some injector work. She's never had a can on her. Ran a PAO/POE based oil for most of those miles and has lived about half her life on E-85 switching at 158,813 miles. Top Tier Regular previous to that with an occasional bottle of Red Line SI-1. Uses no discernable oil. Adult driven. Rarely short hopped and rarely driven in the winter (no salt).
I tried to get some photos' down those stovepipe ports but could not get the phone to focus on the valve. Jason's borescope doesn't take pictures. What I can do is show a few photos of others and explain how they relate to Pepper.
Pepper's Intakes ports looked identical to these in COLOR but with zero deposits on the long side radius or around the guide boss. Just continuation of the brown tones. Yea, cleaner than these. Even the AFM ports looked identical.
This is Cameron's port/valve at 100K. Pepper is roughly the same at nearly twice those miles but are semigloss black, not semigloss gray. (this photo is to compare valves only, port is above)
Moving on to this photo:
This was Dizzy's intakes and valves at 80K. It uses oil, suffers high blow by and the PCV system is of poor design. This motor would have benefited from the can. But the a proper PCV system would have worked equally well.
If you tow, if it uses oil, if you drive like every road is Darlington, if you do long OCI's on shelf oil, a can could be helpful.
I modified the PCV system on this vehicle and when he manifold was off again a hundred thousand miles latter it wasn't half this bad.