What's The Difference Between Oil/vapor Catch Can Systems?

Mike...

Consider for a moment, the air velocity of the oil inlet tube. There may even be some way to measure it. All that oil kicks up, gets taken away by fast moving air to the catch-can, then gets sucked right to the bottom of the can where we hope it stops so that we can drain it in with the rest of our waste oil.

What if we doubled the diameter of of the entire path of oil vapor? We'd slow that air stream by half and probably pick up a lot less of the oil vapor. Some portion of that vapor would never make to the crank-case vent and instead, fall back into the pan.

Maybe look around in your bay and see if there's a good way to add a second PCV system. You might never have to empty that catch-can again.

Edit:

Double the capacity of the PCV system:

Decrease air velocity
Double the volume
Reduce crank pressures/increase ring seal