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.
Debut Radio Show Tues, May 3, 1 p.m. on Hamiltonradio.net The Mechanical Animals
call in for car repair help! 609-503-4058
A recent set--NSFW audio: https://youtu.be/_dcxcZfD6dg
Mangofy your E46!