Consider me biased, since I've been using and selling AMSOIL for over 25 years now, starting in a 73 Saab 99. I've changed cars over to AMSOIL with over 200,000 miles on them. If the engine is leaking now, changing to synthetic isn't likely to seal the leak--it isn't a mechanic in a can.
As pointed out, synthetic doesn't cause leaks, but it can find them if they are plugged by sludge or gunk.
In my turbos, I drain every 10,000 miles, filter change at 5,000. In my non-turbo, change every year, filter change at 6 months.

Before changing over, I recommend use of a good engine flush--best I know of are made by AMSOIL or BG. If you don't, or won't, flush, then plan to change the filter after a couple of thousand miles, and maybe drain the first batch after 3-4,000 miles. The synthetic will clean!
If you can't, or won't, get AMSOIL, Mobil 1 is an excellent second choice.

posted by 64.12.104...

• better to use syn oil in high mile saabs?, WILL, Thu, 19 Dec 2002 22:03:20
  • Re: better to use syn oil in high mile saabs?, RayJ, Sat, 21 Dec 2002 14:37:09
  • Another vote for synthetic, Greg Netzner, Fri, 20 Dec 2002 12:04:14
  • It has been my experience that (+), Vlad, Fri, 20 Dec 2002 11:58:21
    • To show another experience the exact opposite of this>, ChipJ, Fri, 20 Dec 2002 20:06:02
  • Better to use syn oil in high mile saabs!, Dick in Falls Church, Fri, 20 Dec 2002 10:05:33 <-- Viewing This Message
  • Better be prepared......, Gary7, Fri, 20 Dec 2002 08:53:41
    • Re: Better be prepared......, GHdlr., Sat, 21 Dec 2002 05:08:05
  • Re: better to use syn oil in high mile saabs?, Russell Giuliano, Fri, 20 Dec 2002 08:53:28
  • Re: better to use syn oil in high mile saabs?, S-Works, Fri, 20 Dec 2002 00:10:51
  • Castrol GTX 10W-30 (or something like it) works fine..., vsfoxe , Thu, 19 Dec 2002 23:57:48
  • One View, Dan W, Thu, 19 Dec 2002 22:38:45
  • Re: better to use syn oil in high mile saabs?, Patrick c, Thu, 19 Dec 2002 22:28:24
  • Re: synthetic oil takes extreme loads better.., trog100, Thu, 19 Dec 2002 22:20:08

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