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

["DR CHALLENGER" <drchallenger@xxxxxxxxxxx>]

what about adding an additive?


> From: "Dick Benjamin" <dickb@xxxxxxxxx>
> > 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




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