Mine had similar symptoms. I changed the PCV but did not correct the oil consumption. It was only after I changed the Valve Seals that the excessive oil consumption stopped. In fact, it does not even use a liter of oil until the next oil change.
The engine ran smoother too after the Valve Seal change.
Hope this helps you.


Montero SR, 3.5 , 1995 model, ABS, Rear Differential Lock