Well I seam to be having a little blow-by. I'm not sure what is causing this though. I sometimes wont have it and sometime I will. I will have more blowby when I have to get into the truck alot to pass people on the road or such. What could be causing the oil everynow and then? What could case crank case pressure like that? How Could I stop it? I wouldn't think the rings would be worn out at 200k.