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[Max Heim]

No, that is improper chemistry. 1300ppm zinc plus 1300ppm phosphorus doesn't
equal 2600ppm of the compound -- if they are in equal proportions, it would
still be 1300ppm of ZDDP.



on 6/20/09 5:30 AM, Paul Hunt at paul.hunt1 at blueyonder.co.uk wrote:

> Interesting, particularly the table of additive content of various oils *they
> tested*.  However it says that zinc and phosphorus make up the ZDDP, and in
> the table it says SE to SJ have 1301ppm of zinc and 1280 of phosphorus, which
> surely means 2581 of ZDDP?  Quite a bit more than the 1500-1600ppm being
> bandied about.  On the face of it a useful comparison with SL and SM, but
> without knowing what the levels are in individual oils we are still largely in
> the dark.
> 
> PaulH.
> 
> 


--

Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires