Re: Leaded Gas

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Tetraethyl lead was an inexpensive way to add octane to gasoline and also provided a cushion (lubricant) between the valve and the valve seat.  I have had several older cars and have never used a lead additive.  These would include a flathead in my ’53 Merc.  When I overhauled the 292 in my ’55, hardened valve seats were used by the machine shop so that lead in gasoline was not a major issue.  Lead was removed from gasoline when catalytic converters were introduced.  Lead destroyed the chemicals in the converters and rendered them useless.  I agree with John in that we don’t use our old cars in extreme conditions and usually “baby” them.  Under those conditions I think you are throwing your money away buying lead additives.