I would like to start a NEW catch can post for all to follow.

[customboss]

3 hours ago, Jettech1 said:

A lot happened last year.  I retired from Delta in Atlanta after 37 years of service.  Moved to mooseass Alabama so we could be closer to family.  3 miles actually...lol....grabbed a job at the end of July 24 as a regional manager for a facilities maintenance company that was contracted by the DOD, so I had 17 military sites I took care of.  Hated that job and took another one being a dayshift supervisor at Hellas in Dadeville, AL.  We make the plastic thread for a lot of football fields using astro turf.  It's been quite a ride so far but I am loving not living in Atlanta anymore.  37 years in Atlanta was 36 too many...lol.....

I feel ya Brother. Glad you GTF outta ATL. 

Enjoy your retirement. 
Lee

[Pryme]

3 hours ago, Jettech1 said:

A lot happened last year.  I retired from Delta in Atlanta after 37 years of service.  Moved to mooseass Alabama so we could be closer to family.  3 miles actually...lol....grabbed a job at the end of July 24 as a regional manager for a facilities maintenance company that was contracted by the DOD, so I had 17 military sites I took care of.  Hated that job and took another one being a dayshift supervisor at Hellas in Dadeville, AL.  We make the plastic thread for a lot of football fields using astro turf.  It's been quite a ride so far but I am loving not living in Atlanta anymore.  37 years in Atlanta was 36 too many...lol.....

Welcome back to the site Jett

[Jettech1]

Ok, so here's the latest update on my catch can.  I emptied it out at 25k miles.  I had my local chevy dealer change my oil last week at 35,600 miles with 1k miles of towing our camper in that mix and finally emptied it out.  As a note I did have the oil changed at 30k but didn't empty out the catch can.  Surprisingly there was about 2ozs of oil in it.  In all honesty......it didn't matter a bit.  I'm glad I put one on but like some have said, these trucks are idling for hours everyday, working non stop towing heavy loads.  So does it really matter????  I don't know.  I don't have any proof it does or does not.  I see them everywhere now just idling with their lights on at work sites.  I think this engine will prove itself to be one of GM's best designed engines of all time when you include longevity and reliability into the mix.  I know I love mine!!

[lineman1234]

Almost 50,000 on mine now. The can is doing the same thing, same time of year in the same climates. 

 

Doesnt do much in the summer months up north in MN, isnt doing much down hear in Texas for the winter. 

   Pulls a lot of moisture out of the system up north in the cooler days of spring and fall, as well as if im there in the winter. 

 

Is it needed, nope does it do something still. Yep.

[mrjulian416]

14 hours ago, lineman1234 said:

Is it needed, nope does it do something still. Yep.

Perfect summary of these things.

[lineman1234]

This is common in the fall and spring, depending alot on temp, temp being 32ish or less, short trips like 25 miles and stop, 25 miles back, repeat for days. Maybe a week or less.

 

I dont track it much, just check and dump when i think of it, usually weeklyish. 

[GAMark]

On 12/18/2025 at 8:38 PM, lineman1234 said:

This is common in the fall and spring, depending alot on temp, temp being 32ish or less, short trips like 25 miles and stop, 25 miles back, repeat for days. Maybe a week or less.

 

I dont track it much, just check and dump when i think of it, usually weeklyish. 

 

[GAMark]

Which catch can is that?

[Grumpy Bear]

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. 

 

Edited May 2 by Grumpy Bear