I have used it for 60 years and it would take all of the room this site has to post the engine fixes as well as automatic transmissions. I think it may be a waste in the oil unless you had big problems. Pick an engine oil with good additives. I use a MMO injector that injects the MMO from a plate below the carb. I drive to many old Fords and don't remember if I put it in the gas or not. This gets to the areas affected by the new gas. In the tank is better because it does the same as the injector but also cleans the tank, fuel lines, pump needle valve and carb. If valves are realy stuck drizzle down both sides of the engine slowly while running. This usually produces instant results, refer to the slow down in 3rd test in a post above. With dual exhaust pipes after warm up you can also hear slight sticky valves. Running good the duals have a steady boom, boom, boom at idle. Sticky valves will give a boom, boom, bip, boom, boom, bip. Drizzle MMO down the carb, put it in the gas tank, drive 10 miles and it is smooth. I have seen the instant results at least a 100 times. G.M.
but am waiting to hear someone else's report on how well this works before I risk ruining the taste of my morning coffee 
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