At 09:37 PM 05/18/2001 -0400, you wrote:
>I heard a person who might know about it say that the oil companies
>pretended that engines need the lead so they could charge more for the
>gas..And so they could sell you the additives after they had to get the
>lead out.
>
>What say you old engine folks ?
>
>Daisy
>
>
The lead was primarily as an antiknock mechanism. The older engines with
high compression will tend to pound them selves to pieces with the
"regular" gas of today...Tetraethyl lead is highly toxic (white suit kind
of toxic) and not something you would want to add to the gasoline
yourself....Valve metallurgy changed down through the years and someone who
followed it closely will have to step up and tell us when the various
alloys were introduced to prevent erosion etc...
Jim Clark
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