Anyone runnin without a pcv? I am thinking about using a breather and caps, b/c I am blowing oil after switching to mobil 1 5W-20 from dino 10W-30. I don't know if the two are related or not, but I only noticed the oily pcv after the switch. What do ya'll think? P.S. 1997 4.2 120000 miles rebilt in 2004 at 92000 miles. Thanks.