I have heard all of the debates and I have come to the conclusion that both sides need to be connected to a separator. I pulled my throttle body off and it wasn't as worse as I thought it would be, but it had more oil/vapor than I like in the elbow and throttle body. I installed VMP kit last May or around 8K in miles and of course I empty my can at least once a month.
I'm either just going to install another one on the drivers side or pick up an allstar and vent to atmosphere.

 

Wouldn't you need to vent both to atmosphere if you go the venting route?

 

Yes, passenger and drivers side hooks into the same can.

 

I have a can for each side that i have yet to install, looking for a good weekend to break down the intake such and give it a cleaning.

But its going ot be needed for both sides i just know it.

I read on a forum ( can't remember which) that for FI applications venting to atmosphere is not the best, it'll actually saturate the breather filters so much that it'll start blowing oil all over the engine bay.