A single manufacturer may use different colors to differentiate
between different "models" of coolant, (ie the "top of the line" from
the "ripple"),
As far as the borax warning, I got that straight from the owner's
manual.
Rich
--- In DMCForum@xxxxxxxxxxxxxxx, "Walter Coe" <Whalt@xxxx> wrote:
> > The color is only used to identify the manufacturer.
>
> How can this be true when Prestone makes various colors?
> Obviously they don't have a monopoly on green & orange.
>
> The newer "orange" coolant is licensed by GM under the name
> DEX-COOL. You are not likely to find any orange colored
> antifreeze for sale that is not licensed by GM/DEX-COOL. If
> you do, tell me about it. I want to know.
>
> I read over www.prestone.com and have not found any explicit
> recommendations against using DEX-COOL in systems that were
> not designed for it. They say that DEX-COOL is,
> "recommended and formulated for use in all GM vehicles that
> require a GM DEX-COOL® approved formula coolant, as well as
> all other cars and light-duty trucks with aluminum
> radiators".
> So if DEX-COOL is good for aluminum radiators _and_
> DeLoreans were all made with aluminum radiators then
> DEX-COOL is fine, right? Then what about the brass/lead
> heater cores? Those aren't aluminum, and they are connected
> to the system just like radiators. And what if we replace
> our original radiators with brass?
>
> Prestone says that the regular green stuff, "protects all
> cooling system metals from rust and corrosion, including the
> thin, lightweight aluminum found in many newer radiators".
> They don't claim "all cooling system metals" with the orange
> stuff. And I've heard plenty of claims in car show parking
> lots that the orange stuff is only bad for lead solder. Who
> is right? Can anyone prove anything? After the Pigeon
> Forge show, we found that Mike Cohee's heater core was
> leaking, so we replaced it while we were overhauling the a/c
> system. I was certain that it was leaking because he had
> orange coolant in there. Is there a correlation?
>
> And speaking of all these colors, can anyone recommend some
> dyes that I can add to my own coolant so that I can tell it
> from everyone else's? I hate parking over someone else's
> puddle wondering if it came from my car.
>
> Walt
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