What decade-beginning year were all new U.S. cars first required to run on unleaded gas?

PRS	1971 Oct 27 06, 5:42 AM

What-A-Mess

In the U.S., where lead was blended with gasoline—primarily to boost octane levels—since the early 1920s, standards to phase out leaded gasoline were first implemented in 1973. In 1995, leaded fuel accounted for only 0.6 % of total gasoline sales and less than 2,000 tons of lead per year. From January 1, 1996, the Clean Air Act banned the sale of leaded fuel for use in on-road vehicles. http://en.wikipedia.org/wiki/Gasoline http://en.wikipedia.org/wiki/Gasoline In or about 1971 was the first year cars started showing up with Catalytic-Converters. My familys 1972 Mercedes 280 SE 4.5 had one. Oct 27 06, 6:51 AM

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