Re: IML: How about Synthetic oils? (Ken Lang's question)

[aeyn <mr85000@xxxxxxxxx>]

Dick,
    So this means with my car 1975, the ZDDP is not a good thing,
as it has a catalytic converter in it.  My understanding is that
the 1975's were the first year to get the converter.

Æyn

--- Dick Benjamin <dickb@xxxxxxxxx> wrote:

> I'll try to answer this - if it goes through, maybe things are
> working
> again.
> 
> Yes, unless the synthetic oil is recommended for use in
> Diesels, I doubt
> very much that it contains enough ZDDP for use in car which is
> seldom
> driven.  The reason for that is that in order to qualify for an
> SL or SM
> rating (look on your oil container), the Zinc Anti-wear
> additive has been
> eliminate to avoid poisoning the catalytic converter in modern
> cars.  In
> other words, if it is sold for use in modern cars, it isn't the
> right stuff
> for a collector car that is parked for weeks at a time.  When
> Mobil One
> first came out, this wasn't so serious a problem, but the SL
> and SM rated
> oils have really dropped the amount of ZDDP to just about zero
> - the SK
> article gives precise numbers, which I don't have at the tips
> of my fingers
> at the moment.
> 
> Dick Benjamin
> 
> -----Original Message-----
> From: mailing-list-owner@xxxxxxxxxxxxxxxx
> [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Ken
> Lang
> Sent: Tuesday, September 05, 2006 3:44 PM
> To: mailing-list@xxxxxxxxxxxxxxxx
> Subject: RE: IML: New Info on engine Oils - was lifter info -
> From Dick B.
> 
> I'm wondering if this applies to synthetic oils as well.  I've
> been using
> Mobil One in my 67.
> 
> 
> 
> 
> 
> 
> 
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