From: Fred Martin (mung@in-touch.net)
Date: Tue Dec 23 2003 - 07:03:44 PST
I once talked with my favorite automotive machinist about lead additives
and his comments were...if it was a big deal the engineers would have
put warnings all over it and have additives on every counter. His remedy
was...when it came time for a rebuild to put in harder valve seats and
guides. Sounded reasonable to me...I never used an additive after that
and went through several engines but never had excessive valve problems.
I think it was 1973 that they made the switch for the unleaded gasoline
in civilian vehicles. They'll continue to sell additives if theres
enough worry warts out there to keep buying it. (No offense) Fred Martin
bolton8@juno.com wrote:
> I've got a question for our knowledgeable experts on internal
> combustion engines. All WWII and most M-series engines prior to the
> 1980's were made to be run on leaded gas. Since the late-80's leaded
> gas has ceased to exist at the corner pumps.
>
> I have been told by local MV members that running unleaded gas in older
> engines causes serious damage to the valves, such as increased deposits,
> excessive seat wear, and overheated valves. Thus I have been told to
> purchase cans of Lead Substitute and add it to the tank each fill up.
>
> My question is: Just how serious of a problem is unleaded gas to our
> older engines ? And how much lead additive should be mixed with 20 to
> 25 gallons of unleaded fuel ?
>
> LANCE MVPA 22125
>
>
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