The Nation - News from July 1, 1985
Lead concentrations in gasoline take another step down today, but the government said drivers should not worry that their engines will knock or their valves will wear out as a result. The lower concentration of lead is far above the level needed to prevent valve damage, Environmental Protection Agency officials said. Knocking, or pinging, depends on octane rating, experts said, and refiners expect to maintain the same octane level.
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