I was helping tear down an old shed and came across one of these Marvel Mystery Oil "inverse oilers". It was still in the box with the original instructions and everything. Mine is like the one on the right side of the picture. I was wondering if anyone had ever used one of these? From what I understand it works just like an oiler on a compressed air line, but in this case it is oiling your engine's top end via the carb. I thought it would be a neat nostalgic piece on the right car. Any input?