Seafoamed my truck this weekend. Man that was cool. 007 smoke screen . I have just over 100k miles, but it ran really good. I figured after my cam swap I was going to change the oil anyway, so what the hell? I would have never thought an engine that dirty would have run as good as it did. I think it was dirty at least. Isn't that what makes it smoke? I went ahead and put the last couple of OZs in the crankcase to try to clean out any sludge that was building up. It seemed to drive a little smoother and pickup seemed to improve also. Seems like its worth the $6 and cool smoke screen