Steve, this issue has been discussed on the Mercedes group, which have some
very old
cars, and high mileage, 200K and higher. The myth that synthetic will make a
car leak
if it is older and has used dino oil, is just that, a myth now.
When synthetics came out, 30 years ago or more, they did have this problem, but
they
changed the formula, and this is not the case for some time.
This item is discussed on the Mercedes group every 3 months, and the same
conclusion,
a myth.
I changed my 95 SL500 over to synthetic at 30K, and it does not use a drop.
And even if it did use a drop or two, it is a better lubricant.
Try it, and see. You know how much better the trans shifts, but you will get
more
power from the engine.
Larry
Steve Laifman wrote:
> Michael,
>
> Ran my rebuilt tranny 1,000 miles on gear oil, drained it out, with any
> pieces worn off the new edges, and replaced with Mobil 1. It was $10/qt.
>
> In the hope that I am not repeating this warning by singling it out for
>visibility:
>
> I have heard that it is NOT a good idea to change to a synthetic oil on
> a car (engine or transmission) that has many miles on multigrade oils.
> These oils, and others, have detergent additives to keep deposits in
> solution for draining while changing oils. They also permeate seals and
>deposits.
>
> A synthetic oil, I have been told, can clean out these permeation and
> oil/deposit combinations, and they will be removed from all the seals
> and gaskets. This "gunk" just may be the only thing preventing a leak,
> and you will be bleeding from new wounds.
>
> I have no direct knowledge of the accuracy of this view, and it may be
> an urban legend, but I have heard many say to use it on fresh engines only.
>
> --
> Steve Laifman < Find out what is most >
> B9472289 < important in your life >
> < and don't let it get away!>
> <SLaifman@SoCal.RR.com>
> <http://www.TigersUnited.com/gallery/SteveLaifman.asp>
>
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