Paul,

I don't see any blue smoke out the exhaust, at any point. It could be idling for 20 minutes, and I romp on it and it's clean. It just smells extremely rich.

Before when I had bad valve stem seals on 2 of the 4 cylinders, it smoked really bad at idle, and when I took off after burping the bubbles out of the cooling system I covered the whole street in blue smoke. When I pulled back, I could still see the blue smoke linger 100 meters down the street, where I turned around, and the other 100 meters back. And I am not exaggerating lol

I think if my valve stem seals were really that bad, it would show at the 2,500 RPM test as well, which it passed extremely well for hydrocarbons.