Because your gaskets over the plug wells were leaking...and when you pulled the plugs, oil got on the threads. Anyway, hope that's why. When I did my vcg, I had a coating of oil in the bottom of 6 and just a tad in 5. Not sure you looked, but wouldn't surprise me if I'm right and that's all it was. Hope so.
Upcoming comedy shows: March 3 at Broadway Comedy Club, NYC, 8 p.m. March 5, Tierney's Tavern, Montclair, NJ, 7:30 p.m. See Facebook for other shows and PM me if you can make one...love to see you there!
Mangofy your E46!