New V6 engines: 2-stage PCV system....

From the press release of the 3.6L naturally aspirated V6 (LGX):

Two-stage PCV system – This revolutionary system maintains low oil consumption. If features a pre-separator between the block and the engine’s rear cover and a high-efficiency separator in the center of the block’s “V.”

Interesting.

The entire press release can be seen here: http://media.cadillac.com/media/us/...2015/mar/0320-cadillac/0320-cadillac-36l.html