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Old 06-17-2003, 12:20 AM
william rogers william rogers is offline
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Join Date: Jan 2001
Location: oregon
Posts: 2,013
I think this has come up before, but lead and valve seat wear is a smoke screen propagated by Dupont so that they could patten their leaded formula for high test gasoline.Lead added to regular gas made a higher octane, the Romans knew that. Hardened valve seats were simply to make engines last longer......I have to guess that lead helped make sludge in older engines....
William Rogers.......
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