In a message dated 98-08-05 20:30:36 EDT, ray.wei@US.PWCGLOBAL.COM writes:

> I read an article from Popular Mechanics recently.  They said by using the
>  synthetic oil, they "suspect" the engine will develop early leaks on rubber
>  seals.  They said they have seen so many cases that the engine has
>  crankshaft seal leaks, which uses the synthetic oil.  Especially if you
>  alternate the regular and synthetic between oil changes which makes the
>  rubber seal "dry-out" even faster...

They're full of it!  I've run 100% synthetic oil in all my cars since 1983.
Let's see..
70k  84 GTI
80k  86 GLI
60k  82 Rabbit P/U  (60k-120k)
115k 87 Syncro  (45k-160k)
130k 88 Wolfsburg
------
455,000 miles without an oil leak!!

Also "alternate the regular and synthetic".  Who would do such a thing?
Nonesense!

Regards,
Jim Davis