This is on my 88 Toy. 22RE with 4,400 miles on the rebuild. We have replaced the brand new head with another brand new head thinking it was the valve guides. I thought it may have been the rings not seating. No visible leaks of any kind, and no plumes of smoke at all......So where is the oil going? The thinking now is let's try the PVC valve. Next step will be to replace the block..