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, and depending on
the engine's oil circulation system to blend it evenly throughout the entire
system. I somehow don't think that is going to happen, and can envision
pockets of ZDDP lying here and there in random locations throughout the
system. Sure, you could pour the oil into a big container, then ad the ZDDP
& stir it up before putting the oil into he engine.....but why go to all the
bother when some of the more reputable refiners have already done it for
you?
As far as knowing that you are getting SJ spec, as opposed to
SM..........well, there is where the brand name may be relevant. If Brad
Penn, Valvoline, Castrol or Shell says it's SJ spec, well, I think I would
feel quite safe with it.
Bud Osbourne
----- Original Message -----
From: "Peter Caldwell" <peter@nosimport.com>
To: "Bud Osbourne" <abcoz@hky.com>; "Spridgets" <spridgets@autox.team.net>
Sent: Wednesday, July 22, 2009 4:14 PM
Subject: Re: [Spridgets] oil for spridgets
>I mostly agree. But one other scenario occurs to me..... (not to pour fire
>on the oil)
>
> What if, as you and I suspect, that there are, say fewer refiners than
> we'd like to think, brand Q's oil is actually the same as a SM rated oil,
> but they haven't paid the API "dues" to have the privilege of the SM
> "donut" (their word)? So, while the oil IS as manufactured for an SM
> rating, it only says SJ. SM is suitable for use in all previously
> specified SA, through L. The SJ rating does not disclose the formula. It
> is only a test criterion. SM formulations supercede the SJ, but are
> missing the ZDDP component.
>
> The ONLY ways to guarantee that you are getting the proper amount of ZDDP
> is to buy older oil, manufactured prior to 2002 at least, OR a brand that
> actually speaks of their formulation, OR, add your own additive with ZDDP.
> (I use Castrol GTX (brand loyalty) and STP Blue or Red)
>
> If you've dealt with oil salesmen as much as I have over the years, the
> only word they don't use is snake.....
>
> Though there is a brand that speaks of whale oil for automatics....
>
> Peter C
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