Oil catch cans freaking work

[Antonm]

I use Costco Kirkland brand conventional diesel oil in my old mechanical 6BT Cummins trucks. Oil analysis results has shown it be to on par with everything else, so I pick up some every time I find it on sale.

Perhaps try switching to a 5w30 and see if you still get the same catch can fill rate.

On a side note, some of the older Mercedes diesels (like the OM617) had a factory oil separator built into the air filter assembly and its drain just returned to the crankcase via what looked like a second dipstick tube.
...

 

[BlaineBug]

I use Costco Kirkland brand conventional diesel oil in my old mechanical 6BT Cummins trucks. Oil analysis results has shown it be to on par with everything else, so I pick up some every time I find it on sale.

Perhaps try switching to a 5w30 and see if you still get the same catch can fill rate.

On a side note, some of the older Mercedes diesels (like the OM617) had a factory oil separator built into the air filter assembly and its drain just returned to the crankcase via what looked like a second dipstick tube.
...

Mercedes-Benz still have them, they call it an "oil centrifuge" I believe. I am also considering switching to 5w30 due to my research, not due to oil consumption. And lastly, I did not know that there were any Kirkland Signature "conventional" or diesel oils. I have only seen full-synthetic!

 

[Antonm]

Mercedes-Benz still have them, they call it an "oil centrifuge" I believe. I am also considering switching to 5w30 due to my research, not due to oil consumption. And lastly, I did not know that there were any Kirkland Signature "conventional" or diesel oils. I have only seen full-synthetic!

Says "conventional" on the cardboard box that holds the three gallon jugs, but doesn't actually say the word conventional on the bottle label. I guess the absence of the word synthetic implies conventional.

For the casual reader, I use this in a Cummins diesel truck I also own, NOT the tahoe.

 

[BlaineBug]

Says "conventional" on the cardboard box that holds the three gallon jugs, but doesn't actually say the word conventional on the bottle label. I guess the absence of the word synthetic implies conventional.

For the casual reader, I use this in a Cummins diesel truck I also own, NOT the tahoe.

View attachment 425595

Interesting. Maybe I've neglected to notice it.

 

[carterchapman]

Are you guys in cold weather? Supposedly there is less (or none) in warm weather...

 

[Craddock]

Are you guys in cold weather? Supposedly there is less (or none) in warm weather...

Definitely worse in cold weather on our Tahoe.

 

[BlaineBug]

Are you guys in cold weather? Supposedly there is less (or none) in warm weather...

Yes, for less than 2 months, then it will be the opposite extreme.

 

[Darkstar72]

I just put a J&L catch can on my 2017 Denali with the 6.2L a few weeks ago and it’s definitely doing its job. This is my first direct injected vehicle and after seeing all the videos with the carbon covered valves it was a no-brainer to put it on the truck. Super easy install and replaced the PCV valve at the same time.

 

[dancastro]

Been following this thread.
First time I've heard of this device. How critical is it to put one on a 5.3?
The bigger question is why doesnt GM include them on the build?

 

[BlaineBug]

Been following this thread.
First time I've heard of this device. How critical is it to put one on a 5.3?
The bigger question is why doesnt GM include them on the build?

They aren't a factory item because most people don't even check their oil let alone check a disgusting messy catch can filled with the Devil's syrup.