More is not always better. ZDDP is also a corrosive. Flat tappet cams
seem to like that 1200-1400 ppm. Go over that amount (like dumping too
much red-bottle STP into your 20-50 GTX) and you swing the pendulum the
other way.
Easiest insurance: use oil formulated for aircooled motorcycles.
Only a little less easy: use Brad Penn which you can get by UPS or, if
you happen to live near a distributor or race shop, right out the back
door.
Valvoline or Castrol for "classic cars" I would not trust until I had a
sample tested.
If you buy a "race oil" - rather than a "street oil", you should be
aware that the additive package has ZDDP but is not formulated to
tolerate long change intervals. Then again, we probably "over-change"
our oils.
JohnD
Message: 5
Date: Wed, 22 Jul 2009 19:39:36 -0400
From: "Bud Osbourne" <abcoz@hky.com>
Subject: Re: [Spridgets] oil for spridgets
To: "Spridgets" <spridgets@autox.team.net>, "Peter Caldwell"
<peter@nosimport.com>
Message-ID: <C8884D1469BD475B95099AD5120FAC81@OwnerPC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
Personally, I would never try to ad ZDDP to the crankcase. Too easy to
get
the proportions wrong (too much ZDDP is not a good thing, either), and
you
are introducing a large "blob" of the stuff into one place...
Bud Osbourne
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