Just FYI, when my ignition coil went out, all the cranking of the engine (w/ no spark) led to the fuel and oil mixture (it was getting past the valve seals pretty quick back then) running out the intake pipe.

It's been months and despite driving it every day and going WOT many times since then, there is still a gel-like residue left at the bottom of the intake. The gas may have evaporated but the combination of oil and upper cylinder lube that I put in the tank are still there.

My point is that crap could be there from a while ago, hard to believe your car could burn enough oil for it to make it's way past the intake valves and into the intake. Unless it's cranked w/out spark at some point.