I recently purchased a 97 cobra with 88,000 miles on it. Today I pulled the sparkplug wires on my driver side to check if my plugs were good and all of the holes were filled with oil. What causes this, and is it a common problem? Is it something major? You guys are my only source of income besides the magazines, because none of my freinds own stangs (their loss), and the local mustang shops dont want to offer much help unless your buying stuff. Any help would be greatly appreciated.