So my neighbor is a backyard mechanic, does real good with all his work. He swears by this sea foam stuff. Says it will get rid of any ticking or knocking that u might have. Apparently u have to pour some in u'r gas and some in u'r engine oil, then let it run through the system. All the while u get this black smokt out the tail pipes. Has anyone else heard of this stuff? And if so does it really work?

