oil catch can question

[Kain]

I drained my catch can yesterday and checked all fluids before it snows tomorrow.
One thing I noticed is the oil is nice color even after 2800 miles.
Usually it is black by now, of course new fuel injection has a lot to do with that.
But my question is the crap the catch can pulling out of the system helping with that?
And it was not much volume at all.

 

[TreeFarm]

I drained my catch can yesterday and checked all fluids before it snows tomorrow.
One thing I noticed is the oil is nice color even after 2800 miles.
Usually it is black by now, of course new fuel injection has a lot to do with that.
But my question is the crap the catch can pulling out of the system helping with that?
And it was not much volume at all.

What were you using before the catch can? How is your catch can plumbed?

Venting crank pressure to ambient air with "filters" will cause the oil to get dirtier faster. Using a real PCV system sucking the vapor into the intake will keep oil cleaner longer. Catch can isnt pulling anything out of the system. Its keeping crap or "Catching" it before it goes to atmosphere/intake. It could potentially be filtering air before it gets pulled back into the crank case if the can is vented to atmosphere.

 

[Kain]

from pcv to catch can then to port on throttle body

 

[Kain]

so the fuel injection not over fueling is helping with the oil keeping looking like oil and not molasses

 

[TreeFarm]

so the fuel injection not over fueling is helping with the oil keeping looking like oil and not molasses

This is probably what it is. the Catch can will help by keeping your intake slightly cleaner by reducing the amount of oil going into it.

Where is the air inlet for your crank case. the pcv port is pulling air from your crank case in one valve cover to your intake to burn. The other valve cover has? just a filter? Hose to your air cleaner? This will be the main ingress of dirt into your crank case.

 

[6872xtc]

so the fuel injection not over fueling is helping with the oil keeping looking like oil and not molasses

I got to see this myself with a Duramax. One tune was very crisp sounding and the oil stayed clean for 10K miles. Tried a different one and it sounded slobbering and the oil got dirty before 5K. He obviously went back to the original one.