[Fot] oils

William G Rosenbach wgrosenbach at juno.com
Mon Apr 9 14:52:58 MDT 2007


This is why I'm still confused. Is the synthetic oil capable of
withstanding the load by itself or must it have the Zn & P. Hearing from
lots of folks raving about NO wear found on tare down after extended run
time. 

Have all ZN & P containing oils been made unlawful for street
applications? 
On vehicles with OR without a catalyst?
Bill

On Mon, 9 Apr 2007 11:39:57 -0700 (PDT) Chris Kantarjiev
<cak at dimebank.com> writes:
> > > In all the discussion of oils suitable for flat tappet cam 
> applications,
> > > I've not determined if synthetic oils can protect WITHOUT the Zn 
> & P
> > > additives, or do they require it at levels below government 
> scrutiny?
> > > Thanks,
> > > Bill
> > 
> > Synthetic Oils should still contain ZDDP at the levels required by 
> our
> > engines.
> > ie. above 1,000 ppm for both zinc and phsophorous.
> 
> Well ... some do, some don't.
> 
> http://www.lnengineering.com/oil.html has a nice table
> of what oils contain what levels of ZDDP, and indicate
> the base stock, too.
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