The lubrication from the lead was only beneficial on the face of the exhaust valves and seats. That is why hard valve seats give better life than the softer material in the head. Far as valve guide lubrication, it comes from the engine oil coming down the guide, not the gasoline. Adding a bunch of stuff to gasoline will only add to the carbon buildup. IH sent out several service bulletins back in the day, recommending the use of unleaded gasoline to help overcome build up on valves AND the use of low ash oils. This was prior to IH introducing their own low ash oils. Problem was it was very difficult to find. Some oils designated for LP use were very low in ash at that time.
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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