W/o lead your car does run better and as said by Mark there are much less
deposits on everything and everything lasts longer including us.
Mike
----- Original Message -----
From: <SPL311RDST@aol.com>
To: <datsun-roadsters@autox.team.net>
Sent: Monday, April 16, 2001 11:12 AM
Subject: Re: Lead substitute
> Mark Writing here:
>
> "Combustion processes did NOT change by act of Congress"
> (or act of Parliament for the UK readers)
>
> Don't worry about lead or it's lack. The only thing you really have to
> worry about is that you have a fuel of sufficient octane to prevent
> detonation.
>
> Tetraethyl lead was added to motor fuels in the 40's as a cheap octane
> booster. It's "Valve lubricating' properties are largely myth. In fact
it's
> introduction led to far more problems with fouled spark plugs and nasty
> deposits on the valve stems than supposed lubrication.
>
> Any brand of modern fuel will be fine They all have sufficient "valve
> lube" additives to stop the dreaded ' valve seat recession'. There may
> (MAY!) have been some minor problems with the first blends of unleaded
sold
> in the US in 1974, but compared to all of the other mitigating factors
> (drivers suddenly stuck with engines half the size they were used to et
c.)
> even that is questionable.
>
> The quotes there are from personal experience and frustration at the
> subject recurring. ( I gave up on my UK friends with their unleaded scare
> last year) and having run any number of miles with plain iron heads and
> unleaded and never having had any noticable effect. My first Cortina was
run
> very hard indeed and tinkered with unmercifully. If there were any
problems
> with valves I certainly would have noticed.
>
>
> Going to specific examples - EVERY engine with aluminium heads ALREADY
has
> the 'Hardened Valve Seats" so loved by machine shops out to make an extra
> buck on the gullible. There's no other way of doing it really given the
metal
> choices available du to the differning coefficients of expansion for
putting
> a seperate valve seat in in the first place.
>
> If it makes you feel good to pour extra stuff in your tank, go ahead.
But
> for all the necessity and advantages of doing so you could just give the
> money you spend to the next homeless person you see. Either way you'll
get
> a feeling of accomplishemnt without doing much.
>
> Mark not
> Laurie :-)
> 70 SPL311
> 69 SRL311
> Chandler, AZ
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