Leaking rear seal; big deal or not?

[Motion Camaro]

<font color="blue">Even easier fix I was told about some time
ago by my old boss.

If the seal is leaking .... ... I don't know if your
ready for this kind of hi-tech info .... ....
ok, ok ... here it is: pop open the oil cap, ...
... crack an egg in it &amp; drive the car. The leak
should stop in a couple of days &amp; no harm will come to the engine.
I told you guys you weren't ready for it ...

Maybe a few &amp; it will seem like a good idea.
I never tried this, but I did mention this a couple of times to some 'older' guys &amp; they said it works. </font>