have a 2005 Dodge 2500 DIesel 5.9L with bad turbo. I changed it but didn't cleaned the intercoller. so had runaway engine becuase of that. after i cleaned then everything, engine smokes heavy and oil comes out of exhaust manifold cylinder 3 and 6. engine is heavy shaking. had to replace turbo again, because of ruaway cause the seals in the brnad new turbo. what does that oil mean. had some they told me head gasket, but can't imagine that's it.
Your cylinder is scoreed on 3 and 6, it probaly happen during your runaway,I know this is not the answer you wanted to hear,I hope this helps you?
Could posibley be the sleeves are scored or worn out and alowing blow by