Quote:

Ive got full vacuum at idle in my durango. When I put my finger over it I can hear the valve snap inside, but It has FULL vacuum at idle and I couldn't get a straight answer googling things. Would this cause some oil consumption.



A stuck or imoperative PCV valve can cause a motor to gum up and then use oil.
But, I've never seen one working cause it.
The PCV valve really never completely closes, tha tI've seen. They open fully at low vacuum/WOT.