Daniel,
       The real purpose of the color is to clue you
into what may be mixed.   Green with green, red with
red, orange with orange and piss with piss.   Daniel,
piss is yellow and who makes piss and for bonus points
what is it?
           gary
Date:    Tue, 3 Jan 2006 20:17:04 -0500
From:    "Daniel L. Katz" <katzd54@YAHOO.COM>
Subject: Re: coolant options

be careful here:

if ethylene and propylene glycols are mixed, then it
isn't straight
forward determining the level of freeze/boilover
protection, at least
with
an ordinary hydrometer.

2. green color is simply a dye, and is not a reliable
indicator of
coolant
type.

3. propylene glycol may be less toxic than ethylene
glycol, but in both
cases the chemicals dissolved in used anti-freeze
substantially
increase
toxicity.

On Tue, 3 Jan 2006 08:26:33 -0800, gary hradek
<hradek@YAHOO.COM>
wrote:

>Robert,
>      There is very little difference between
Ethylene
>Glycol and Propylene Glycol  One is a three carbon
>alcohol and the other is a two carbon alcohol.   They
>do nothing more than keep the coolant from freezing
or
>boiling.   The two carbon alcohol is less toxic.
>    The real difference in coolants has to do with
>what they add to make them anticorrosive.   You
should
>not  mix the different types of anticorrives but you
>could mix the different forms of alcohol.   The green
>stuff usually contain the phosphate based
>anticorrosive while the orange stuff contains the
>organic detergent based anticorrosives.   Even a
small
>amount of the green stuff can cause the orange stuff
>to sludge so if you change from the green to the
>orange it is important to rinse the coolant out until
>there is no smell of coolant.   Hope this helps.
>   gary

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