Originally Posted By: ProStreetCamaro
Originally Posted By: Unleashedbeast
The oil consumption of a LSx motor is caused by oil being sucked into the PCV system and injected back into the intake manifold.
DING DING we have a winner!
lol, my 1999 Trans Am introduced me to the poorly designed PCV system in the earlier LS1 engines. The LS6 engine tried to correct the problem with an updated and improved valley cover. It slowed down the problem, but didn't stop oil from being sucked into the intake from the PCV system. I would lose from 1/2 to 3/4 a Qt every 4-5K miles.
My 4.6L modular in the Mustang has similar issues. I had to add an oil separator to eliminate oil getting back into the intake.