By the way - The problem is the Crankcase Vent Systems on a number of manufacturers - Check the posts on other forums - Here's a press release from Corvette:

PCV-INTEGRATED ROCKER COVERS
One of the most distinctive features of the new LS1 Corvette engine is it's domed rocker covers, which house the patent-pending integrated positve crankcase ventilation system designed to enhance oil economy and oil life while reducing oil consumption and contributing to low emissions. ** yada yada yada ** covers contain baffles that separate oil and air from the crankcase gases - about three times the oil/air separation of previous engine.

We all know it's a problem - even us non-engineer type - shade tree-ers.