So it's been a while since I've posted about my SD33 diesel on here. Life got in the way the past 6-7 years of ownership and the Scout has sat in my dad's shop unfinished in that time period, but it still drives. A couple months ago I got the Scout going and drove it up to my shop to get it finished and back on the road. Long story short, I was about to change the intake/exhaust gasket because it was leaking (you could see smoke blowing out the manifold area) and when I pulled the intake off, there was a lot of soot buildup and oil. I was like "That can't be right." Pulled the exhaust manifold and it was worse. There was a lot of oil on the valves. Plus, the oil is really thick and tacky. I did change the oil back when I bought it and used Rotella T 15w40. I'm hoping it's just from sitting for so long and will come out of it once the Scout is finished and gets driven more. What do you guys think?