[s-cars] Rear main seal leak - try dino oil again?

[Mike Claire]

I don't think going back to dino is going to help you.  Here's what I've
read on the "Bob is the oil guy" forum.  When you use dino oil for years,
sludge builds up and covers the seals, and they dry out because they're no
longer wet with oil.  If you switch to synth, it eventually dissolves the
sludge, exposing the seal.  But the seal is dried up - so it starts leaking.

So if this theory is right, you have 2 choices - switch back to dino and
give it 10 years to sludge back up :)   Or try stop leak (assuming replacing
the seal is out of the question).



Mike


On 4/15/07, hoog23 at aol.com <hoog23 at aol.com> wrote:
>
> Last week I reported that my clutch was slipping.  Upon further inspection
> it appears to be the rear main seal that is leaking and causing clutch not
> to hold new RS2 power.
>
> Currently running winter 5-40 synthetic.  Since its (supposed to be)
> springtime now I was going to switch back to mobil 1 15-50 synthetic.  But I
> noticed a case of old Penzoil 20-50 race oil left over from my old LT1 vette
> days (yes I should have kept that car).
>
> Should I give the dino oil a go first in hopes of abateing the rear main
> leak?
>
> I figure that I might as well try it as the case of penzoil will probably
> sit there another 10 yrs.
>
> I noticed on 'two-guys garage' this morning (I have no life) that
> bars-leak has a rear main seal 'restorer' product that they used on an old
> T-bird.  But who knows what it would do inside a turbo?
>
> Dave
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