Dan,

Maybe I am showing my ignorance, but I have downloaded lots of materials
from the list on coolants, both posts from the last few years and ones
found in the archives, and read them.  I don't think that blue, green,
and orange coolants are clearly known to most as distinct "actual
chemical strategies."

For example, some green coolant contains phosphates while some others
don't.  I think the same is true for orange. VW coolant is blue, but
there are other blue coolants, although I don't know if any of them have
phosphates or are different or similar to VW coolant in their
ingredients.  Of course, there could be other compositional differences.

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?

Sam

Sam Walters
Baltimore, MD

89 Syncro GL
85 Westy Weekender
84 Vanagon, original owner, soon to be retired, just too many problems

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