I didn't buy anything yet Tim. If there isn't a leak from the tube , then it must be oil blowing past the spark plug. And if that is the case it would have a leak at the rings, valve guides, or head gasket ? The plug isn't fouling, the color is the same as the rest of the plugs, and the color is light tan ?I don't have
smoke out the tail pipe , the tail pipe color is black and dry .It does use a little oil , when I bought the van it had water in the oil , and been over heated and
had blown the rear freeze on the head , I replaced the freeze plug and used a head gasket sealer , I haven't had water in the oil since approx. 13,000
miles . It runs like a raped age , gets 27 mpg highway , 17 mpg city , has 153,00 miles on it.Thanks Bruce