between the colors, but i would say it has a blue tinge. And the SZ mufflers definitely have some blackening on them. It is only on deceleration which has me think it is only under vaccum? I will check those banjos. Also, The PCV on the rear drivers side under the idle air control valves has a tiny split we found (prob from when we dropped in the engine and it got pinched on something). Could this contribute?