On Thu, 29 Apr 2004, Sam Walters wrote:

> So, for the sake of those of us who aren't clear on this, what are the
> actual chemical strategies to which you are referring and which major
> coolants, of what color, represent these strategies?

The "orange stuff" is *usually* Dexcool, a formulation originally
developed by GM for their newer vehicles.  However, there are similar (but
not identical) long-life formulations being used by other automakers, in a
variety of colors.

The "green stuff" usually contains phosphates and silicates, and is the
older "standard" coolant.

The "blue stuff" is VW's proprietary coolant.

David Brodbeck, N8SRE
'86 Volvo 240DL wagon
'82 VW Vanagon Westfalia Diesel