I have found the same thing , sludge like coating on the bottom of the pan. It surprised me at first then thought about it. I figured it was the assembly lube settled out. Cleaned out the pan and bolted it back on. I have also noticed with the intake off a certain RED cam / lifter assembly lube just wash right of as the engine was being primed and turned over..

it's ok to butt heads, just don't do it with a butthead