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



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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