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Lead was added to gasoline in the past to raise octane levels and prevent valve seat recession. I am not aware of any "lubrication" properties of a few grams of lead in gasoline. It never "lubricated" the valves, it just left a residue after combustion on the exhaust valve seats that prevented cast iron erosion under high load conditions.
The gas additive that is sold as "real lead" is actually 99% real kerosene with only a tiny amount of TEL in it. It will do nothing to enhance the durability of any part in your FI unit, nor will it raise the boiling temperature of gasoline to prevent percolation. It will, however, burn quite well in a kerosene lantern. And, if your lantern has valve seats, it may help prevent recession under high loads.
The gas additive that is sold as "real lead" is actually 99% real kerosene with only a tiny amount of TEL in it. It will do nothing to enhance the durability of any part in your FI unit, nor will it raise the boiling temperature of gasoline to prevent percolation. It will, however, burn quite well in a kerosene lantern. And, if your lantern has valve seats, it may help prevent recession under high loads.
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