To keep older cars running smoothly, fuel additives that create the equivalent of low-lead gasoline are available at most auto parts stores. Regular use of these products can help lubricate valve seats and guides, preventing premature engine wear. It is important that additives are lead supplements and not octane enhancers, which may not provide the needed lubrication. A long-term solution is to replace the engine's original valve seats with hardened steel inserts. This modification should be done by a qualified machine shop.
Costs can vary widely depending on the vehicle involved.
Many drivers of older cars have already made the transition and leaded gas has disappeared from most service stations. More than 90 percent of cars on the road today were designed to use unleaded fuel.