Many people use Marvel Mystery Oil added to the gas tank but FWIW I don't
think you need to worry as Datsun used stellite exhaust valves and hardened
seats on the exhaust which is where most of the valve seat wear takes place.
I recently pulled the head of my cast iron 1600 and saw no valve seat
wear/recession and that's w/no seats and about 40K miles although admittedly
I used leaded gas for about 1/2 of the miles.
Mike
----- Original Message -----
From: "John Schmitt" <jschmi7@us.ibm.com>
To: <datsun-roadsters@autox.team.net>
Sent: Monday, April 16, 2001 10:16 AM
Subject: Lead substitute
> With all of the discussion of the lack of parts and reliability of the
> 2000, I thought I would bring up a question I have seen before but do not
> remember the answer. When I had my head done 8 years ago I was not
> knowledgeable enough to ask to check for replacement valve seats. I had a
> couple valves replaced and the surface cleaned up and that was it. When I
> asked the machine shop, later if they checked, they said they could not
> possibly remember. So, I must go under the assumption that I have the
> standard original equipment valve seats.
>
> As a result, I must/should use a lead substitute at each tankfull to
> protect my head. At the local Trak Auto superstore, they carry a lead
> substitute that is made by CD-2. There is no listing of components so I
> dont know what it is. Is there a particular product that we should be
> using that is a true protection/substitute for lead?
>
> John Schmitt Telecommuter External # - 847-458-7829
> pager 800-759-8888 pin# 8710561
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