No improvement
I took off the turbo manifold to inspect, and it seems OK
I removed the spark plugs, 1/2 are black, 3 is black and slightly wet, 4 is black and very wet. I think it's oil, but not entirely sure.
So I don't know where to go from here exactly, I haven't done a compression test yet, I feel like that's the next step. If the engine is toast, that's fine, but I don't want to drop another in just to have the same issue.