As just a peace of mind thing I swapped plugs as part of my 30k Service. This the first time I've ever seen plugs ouf of a boxer engine, so I don't know what they're supposed to look like. However, compared to the plugs out of my '89 Toyota SR5 V6, these look HORRID. Especially the one that's all oily. The photo also doesn't really show that the ground arch is covered in a fine white powder. Is something wrong with my engine?