[deuce_roadster]

Lead was added to gasoline in the 1950s when high compression engines were pinging and needed the lubrication on the valves. You don't need an additive. If you ever have to rebuild the engine you can install hardened seats on the exhaust valves but an old stocker will do fine without the lead. I live near an e-free station and that is all i put in any of my old cars, chain saw, leaf blowers etc that sit around.