I played the blow by game last week. As lots of members said before, seems to be common for these engines. I had turboed my 6.9, and never really gave much thought to the blow by prior to the conversion, but did notice the inside of the intake was very oily. I tried the road draft tube like I ran on my cars back in the day, and she looked as if she had dual exhaust... I ended up running a banks breather adapter which mounts to the front timing cover, into a catch can and back to the CDR. It seems to do a better job of pulling off the vapor while keeping oil itself in the engine. I think my issue was getting splashed liquid oil pulled up into the CDR. Long story short, she has less oil smoke out the tail pipe and the intake track is staying cleaner. A catch can is easier to do on a turbo just due to placement of the CDR, but with a little thought you could probably fab something up using the original CDR mounting point on your NA. My catch can was a plastic mayo jar, which I'm considering replacing with a tig'ed aluminum tank, but now I'm thinking of leaving it just because it looks so cheesy!