"What really counts is the deposits/color of the porcelain insulator. Duke"
Sorry should have described the plugs, Duke your right on the money, the porcelain insulator is black, (not oily) but the dry carbon fouling look. I thought changing O2 sensor would have corrected the problem, a wrong guess on my part.
I need to get set up so I can send pictures.
500E sway bars
210 16in wheels