<VV> Wrong oil in rebuilt 110

[Ron]

So, can SM have P from zero to 100%?  Is there a minimum?

RonH
(P is the symbol for phosphorous)

----- Original Message ----- 
From: <BobHelt at aol.com>
To: <tonyu at roava.net>; <virtualvairs at corvair.org>
Cc: <ChiefTAM at aol.com>
Sent: Tuesday, September 25, 2007 2:40 PM
Subject: Re: <VV> Wrong oil in rebuilt 110


>
> In a message dated 9/25/2007 12:47:16 PM US Mountain Standard Time,
> tonyu at roava.net writes:
>
> Rotella  has  been reformulated and the additives (zinc, phosphor etc)
> needed  to keep lifters from scuffing cam lobes have been
> reduced.    It's now rated SM...  still OK if you spike it with some
> of the  additives available for protecting hard-contact points like
> flat tappet  cam lobes.    But running it straight will now work no
> better  than any other SM rated oil.
>
>
>
> I apologize if this seems to come off wrong, but there seems to be a lot 
> of
> confusion and misinformation concerning recent oil specifications.
>
> For example, SM rated oil is NOT just ONE phosphorous (ZDDP) spec but it 
> has
> variable max  limits. These limits depend on several things. For  example 
> if
> the SM is also rated as "energy conserving" as identified by the 
> Starburst on
> the front of the container, then the limit  of Phos is 0.08%.  But if 
> those
> words are missing and there is no Starburst, (this depends on the 
> viscosity
> rating) then there is NO MAX amount of Phos spec'd. That means if  there 
> is also
> an SL or even an SJ  shown with the SM (but no Starburst) ,  then the SM 
> oil
> can have elevated amounts of Phos as might be in racing oils.  The Phos 
> limit
> for SL is 0.10% and for SJ is 0.12%. But plain old SM without the 
> starburst
> could have any max amount of Phos (NO LIMIT!!!) per the SM  spec.
>
> But these are only the API specifications that the oil must meet (to 
> retain
> the API's authorization). There is no way to identify the actual content
> without constant and expensive lab testing.
>
> Also BTW, the amount of zinc in any oil is NOT specified and is only 
> there
> as a result of the Phos being added via the ZDDP.
>
> Regards,
> Bob Helt
>
>
>
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