Can an engine force oil through a good AOS?

[JFP in PA]

Originally Posted by Gelbster

Thanks for this explanation. I did not know this about the X51. I had only read the 'sexy' parts of the X51 kit - sports exhaust ,extra mystery power and cost. I have never seen a comprehensive list of all the X51 differences. The extra scavenge pumps and N.W. passage certainly seem desirable and rather inexpensive to have made a standard feature.I understand why it would be expensive as a Dealer installed retrofit/option.
But for the P.O.'s question it does hint at an (unlikely?) cause

The X51 "kit" is a $15K item just for the parts, and includes new cylinder heads, making it a very expensive add on as it requires dropping the engine and a PIWIS.

As mentioned above, I would look at the existing scavenging pumps before getting exotic.