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On 7 Mar 2001, at 23:39, Steven Ayres wrote: > Sorry, this is a well debunked myth that we've been through at least a > couple of times before on this list. Lead in fuel has no appreciable effect > on normally operated engines other than to slowly poison us and our > neighbors. It was snake oil in the days, just as lead substitutes are snake > oils today. A lot of old water cooled cars with cast iron heads have the valve guides and seats machined right into the head. I am under the impression that these heads will wear dramatically without lead in the gas. These heads can be upgraded to pressed-in bronze guides and hardened seats, but this is a significant expense. Fortunately these features have been part of the VW head construction from the beginning. There was concern in the early days that VWs would suffer from lack of lead, but this has certainly been debunked. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- Pitch in! Send your pledge of support! mailto:support@vwtype3.org