I think it depends on what you have in there. Some you can mix and some
not.
   I am running "Havoline Phosphate Free with Dex-Cool". That "Dex-Cool"
makes it incompatable with many other types of anti-freeze although there
are some that can be added. These say "Compatable with Dex-Cool" on the
label. I cannot say why they are incompatable. Perhaps it is just a
marketing angle, perhaps not. It's that "perhaps not" that keeps me from
mixing. Anyway, the Havoline is cheap enough and the Westy seems happy.

> -----Original Message-----
> From: Vanagon Mailing List [mailto:Vanagon@vanagon.com]On Behalf Of
> SamSco@AOL.COM
> Sent: Thursday, July 09, 1998 9:50 AM
> To: Vanagon@VANAGON.COM
> Subject: Re: vanagon antifreeze
>
>
> What about this notion of mixing (or let's just say topping off) these
> different antifreeze formulas?  Think that really is a no-no?
>
> Sam
> '91 Carat
>