Re: [Amc-list] leaded gas WHOA guess I won't be doing this any more

["Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>]

Bruce,

My 70 304 has all the original head pieces and parts, except for guide seals
and gaskets.
Might I be correct in saying that the additive commonly known as lead
substitute
doesn't really do squat to protect the valves and seats??
Are the lead substitute manufacturers then just pulling our legs??

Armand


----- Original Message ----- 
From: "Bruce Hevner" <scramblr@xxxxxxxxxxx>
To: <amc-list@xxxxxxxxxxxx>
Sent: Sunday, July 06, 2008 9:40 PM
Subject: [Amc-list] leaded gas WHOA guess I won't be doing this any more


> >I have seen a lot of engines with the valves burnt after the first
unleaded
> gas came out. Most modern >fuels have a built in additive to prevent this
> now. Marvel Mystery oil helps in some older engines too. >Just don't use
it
> (or 2 stroke oil) in engines with an O2 sensor (It can be an expensive
> mistake!)
>
> To my knowledge none of the fuels today have any additive to protect valve
> seats. Might you be thinking of MTBE?? No longer used, it was an octane
> booster, not a valve seat protector.
>
> Marvel Mystery Oil is nothing more than a synthetic blend with some
> penetrates (like most of the other low cost valve seat additives).  I
doubt
> it would do anything to protect valve seats. In an engine with O2 sensors
> there's not much you can do other than install hard seats & valves if it
> doesn't have them.
>
> But hey,,, that's just ME!!!
> Bruce Hevner
>
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