Since I have bought my truck it has always leaked a little oil but I wasn't to worried about it, maybe a quart or two in 3-5k miles. Then I put the twins on and I started really leak oil like a quart every 100 to 150 miles, but at the same time the external waste the twins had I could never get it to work as it should so I just eliminated it, I know not a good plan but I had to start somewhere b/c it was leaking soot all around it. Once I got I off of the truck it seemed to build boost a lot better but now I think the gaskets or the piping is bad b/c now I'm blowing soot all over the motor, but now it seems that I am not going through any oil in comparison to what I was. Would those things have anything to do with each other or not. This past weekend I took A trip of 400 miles pulling a 7000 lbs gooseneck and did not use any oil? So I am open to any ideas or advise, thanks in advance.