Originally Posted by bygddy
I spoke to the previous owner and he swears it wasn't using oil at all.
What did you expect him to tell you, the truth?
When L31 heads and aftermarket cam are mentioned in the same post, I begin wondering about whether or not the builder actually prepared the heads for more lift or not. I'd be pulling a spring off an intake valve to inspect the seal and see if it's been smashed into submission by the underside of the retainer or not.
No. 2 possibility....oil rings not installed correctly.
No. 3 possibility....intake manifold not sealed to head ports, motor sucking in oily vapor from crankcase on intake stroke.