Jimm 6/16/2012Check the pump to make sure its ok. I'm assuming the oil pickup is the same and in good condition. Honda has an oil flow orifice in the block where it meets the head in between cylinder 2 and 3 that regulates oil pressure to the head. If the oil flow orifice is clogged or blocked - it will get crazy oil pressure to the head.
I would expect the oil in the spark plug maybe related to the excess oil pressure on occaision.