Why Antifreeze 50/50 Ratio?
E. Sturm
Does anyone know the reason why antifreeze to water ratio in a car should
never exceed the 55/45 ratio? As an experiment, 4 years ago I decided to
run pure antifreeze in my '83 Dodge Ram B250 van with the 318 V8 engine.
This vehicle is driven throughout the year where summer heat can sometimes
reach over 100 degrees and winter temps can be as low as -10 degrees. I
have had absolutely no problems with the cooling system on this van and to
this day, I have not needed to change the antifreeze. It looks as "clean
and green" as when I put it in (I also use an antifreeze testor to verify
this). Prior to this I used to have to change the antifreeze on the van
about every two years. I have two newer cars that I run the standard 50/50
mix (what the owners manual and antifreeze bottle states) but I have to
change the antifreeze about every 2 years since by this time it has turned
a nasty brownish color (no doubt caused by oxidation). It seems that with
a 50/50 mix that there is still too much water in the system which is
responsible for causing oxidation of the internal parts (particularly the
water pump housing and impeller which is usually made of cast iron and the
water passages on the block itself). Oxidation of any internal parts can't
be good for them and can cause premature pump failure, blocked and/or
reduced passages, etc. Do anitfreeze companies tell you to use the 50/50
mix just so that they can perpetuate you having to purchase more antifreeze
from them every couple of years or is there a scientific reason for this?
I am now contemplating running pure antifreeze in my other two cars since I
feel that I have 4 years worth of proof to back up my claim. Any thoughts
on this would be greatly appreciated.
Charlie
From what I remember from chemistry class, mixing two liquids can achieve a
lower freezing point and a higher boiling point. That's the whole idea of
mixing anti-freeze with water in a car. These two temperature points depend on
the ratio of the liquids (among other things), and there is (I believe) some
optimum ratio where you get the lowest freezing point and highest boiling
point. I don't know what the freezing point of just pure antifreeze is, but I
don't think it's a good idea to use just straight antifreeze without adding at
least some water to achieve good freezing/boiling points.
Ken Hilson
My understanding was that as the glycol % increased that the freezing
point began to rise again and maybe the boiling point lowered.
Do you use ditilled water?
"E. Sturm"
the fly
"E. Sturm" <est...@hcitech.com> wrote:
100% antifreeze will freeze at about 0 deg. F, as opposed to a 55-45
mix, which protects down to roughly (-40).
In addition, pure antifreeze will hasten the formation of silicate
deposits in the system. This plugs the rad & heater cores, builds up
on the inner surfaces of the cooling system. It's also a barrier to
heat transfer. 1/16 to 1/8 inch builup of silicate deposits is a
thermal insulator equivalent to 4 in. thick cast iron.
Mix your coolant according to the mfr's recommendation.
John Weiss
The main reason for using 50/50 is that the heat transfer capability of
antifreeze is significantly less than that of water. The 50/50 mix gives
the best compromise of freeze/boil protection and heat transfer for the
average year-round user.
If your car has a cooling system that's well over the required capacity, you
might be able to use 70/30 or even 100% antifreeze successfully in most
conditions. Personally, unless there was a cold-weather reason to use more
anti-freeze, I wouldn't exceed 70%.
---------------------
John R. Weiss
Seattle, WA
Remove *NOSPAM* from address to reply
E. Sturm wrote in message <01bd160c$ba551a40$14c5...@esturm.hcitech.com>...
Ken Payne
"E. Sturm" <est...@hcitech.com> penned:
>Does anyone know the reason why antifreeze to water ratio in a car should
>never exceed the 55/45 ratio? As an experiment, 4 years ago I decided to
>run pure antifreeze in my '83 Dodge Ram B250 van with the 318 V8 engine.
>This vehicle is driven throughout the year where summer heat can sometimes
>reach over 100 degrees and winter temps can be as low as -10 degrees. I
>have had absolutely no problems with the cooling system on this van and to
>this day, I have not needed to change the antifreeze. It looks as "clean
>and green" as when I put it in (I also use an antifreeze testor to verify
>this). Prior to this I used to have to change the antifreeze on the van
>about every two years. I have two newer cars that I run the standard 50/50
>mix (what the owners manual and antifreeze bottle states) but I have to
>change the antifreeze about every 2 years since by this time it has turned
>a nasty brownish color (no doubt caused by oxidation). It seems that with
>a 50/50 mix that there is still too much water in the system which is
>responsible for causing oxidation of the internal parts (particularly the
>water pump housing and impeller which is usually made of cast iron and the
>water passages on the block itself). Oxidation of any internal parts can't
>be good for them and can cause premature pump failure, blocked and/or
>reduced passages, etc. Do anitfreeze companies tell you to use the 50/50
>mix just so that they can perpetuate you having to purchase more antifreeze
>from them every couple of years or is there a scientific reason for this?
>I am now contemplating running pure antifreeze in my other two cars since I
>feel that I have 4 years worth of proof to back up my claim. Any thoughts
>on this would be greatly appreciated.
>
Everyone here missed one vital point: anti-corrosion. This is the
reason you need to flush your cooling system each year. Part of
the anti-freeze is sacrificed in reaction in order to prevent
oxidation of the engine block/radiator. I've got a good article
on this if anyone wants a more scientific explanation (its very
interesting).
http://www.ford-trucks.com - Ford Truck Enthusiasts
-Ken, Admin 1967 Ford F100, 390FE V8
To send me email: webmaster*spam-remove*@ford-trucks.com
Check out the free Ford Truck Enthusiasts Web Site/Email Lists.
Questions, answers, chat and Ford speak. 1400+ members and growing.
All years of F-series, E-series, Rangers, Broncos, Bronco IIs, Rancheros,
Explorers, Expeditions, Econolines and pre-F series are all covered.
jame...@cryogen.com
The reason is because a 50/50 mixture of E.G. and water has a higher
boiling point and a lower freezing point than pure E.G. When you mix
the two together, it changes the characteristics of both liquids.
I don't have the exact numbers on hand but pure E.G. freezes at
something like -40F where as a 50/50 mixture freezes at something like
-70F.
The reason you couldn't tell any difference from running pure E.G. was
because it probably doesn't get that cold where you live.
I work in the chemical industry and was wondering the same thing until
I saw a listing of different strengths of E.G.
Jim
I have heard the experts caution on not using too high a percentage of
antifreeze due the possible buildup of deposits caused by the antifreeze.
The thought was that people will add 100% antifreeze for makeup and end
up raising the antifreeze to water ratio.
Jim in Md.
Craig Keener
alanno...@blahblahblahmindspring.com wrote:
>
> You shouldn't exceeded 50/50. It is clearly stated that this is
> the ratio that provides the lowest freezing point.
>
Stated where?? If it were a CHILTON publication I might
understand. You might even be entitled to a sympathy allowance.
otherwise....
FTR a 50/50 mix provides protection down in the neighborhood of -34F.
The 70/30 blend is good 'till about -84 F. If you don't believe it, the
answer is as simple as checking the back of an EG antifreeze bottle
sometime. The truth will set you free...:)
- Craig
--
Spam-free correspondence to: ckeener AT erols DOT com.
John Weiss
You'll find on the jug that a 70% antifreeze mix gives the lowest freezing
point. Since they caution against using more than 70% and don't list specs
beyond that, I don't know if this is a "eutectic" mixture or not.
At any rate, your assertions regarding the 50% mix are inaccurate.
---------------------
John R. Weiss
Seattle, WA
Remove *NOSPAM* from address to reply
alanno...@blahblahblahmindspring.com wrote in message
<68hg9h$t...@camel18.mindspring.com>...
>
>The 50/50 ratio provides the lowest freezing point for the
>coolant mixture.
You're risking a lot by running full antifreeze coolant. Not to
mention that it costs a lot more than using the 50/50 mix.
Not to mention that the stuff is DESIGNED for the 50/50 mix.
Why ask why?
Luke Nelson
That is funny, in my stock International-Harvester maunaul, it says go
witha 50/50 mix unless you are going to experience temps -20 or lower,
than go with 100% antifreeze. so I go with 100% and have never had a
boilover or frezeup. What would make International different? *they do
have obscenely huge raiditors*
Luke
In article <68hgd9$t...@camel18.mindspring.com>,
<alanno...@blahblahblahmindspring.com> wrote:
>Near the end of the millennium, on Wed, 31 Dec 1997 13:01:57
>-0800, email.ad...@end.of.message.com (Dick Brewster) gave
>this insight:
>
>:In <68e90l$7...@q.seanet.com>, John Weiss of
>:jrweiss@seanet*NOSPAM*.com wrote:
>:
>:> The main reason for using 50/50 is that the heat transfer capability of
>:> antifreeze is significantly less than that of water. The 50/50 mix gives
>:> the best compromise of freeze/boil protection and heat transfer for the
>:> average year-round user.
>:>
>:> If your car has a cooling system that's well over the required capacity, you
>:> might be able to use 70/30 or even 100% antifreeze successfully in most
>:> conditions. Personally, unless there was a cold-weather reason to use more
>:> anti-freeze, I wouldn't exceed 70%.
>:> ---------------------
>:
>:Around 70% does give the lowest freezing point (I think it is
>:actually about 68%). An optimum mix gives protection down to
>:about -90F, if it's off by a couple of percentage points (higher
>:OR lower), it freezes at about -60F.
>
>Guess you'll have to document this one! I've seen graphs of the
>ratio vs. the freeze point, and I believe 50/50 was the lowest
>freeze point.
Larry Shilkoff
alanno...@blahblahblahmindspring.com wrote in article
<68hg9h$t...@camel18.mindspring.com>...
>
> The 50/50 ratio provides the lowest freezing point for the
> coolant mixture.
>
> You're risking a lot by running full antifreeze coolant. Not to
> mention that it costs a lot more than using the 50/50 mix.
>
> Not to mention that the stuff is DESIGNED for the 50/50 mix.
>
> Why ask why?
>
>
Why? When an answer sounds incorrect I ask why. According to the back of
a Prestone coolant jug, the coolant is good down to -34F with a 50/50 mix
and good down to -84F with a 70/30 mix.
Where do you get this "DESIGNED for the 50/50 mix" stuff?
Larry
Jusinski
> > :
> > :Around 70% does give the lowest freezing point (I think it is
> > :actually about 68%). An optimum mix gives protection down to
> > :about -90F, if it's off by a couple of percentage points (higher
> > :OR lower), it freezes at about -60F.
If you do a lot of them, 50/50 is easy to remember, works almost every
where, and is easy to measure. A gallon of Eth.glycol and an empty
gallon jug and you're all set for two gallons of mix.
Matt
Joshua Van Tol
>
> Stated where?? If it were a CHILTON publication I might
> understand. You might even be entitled to a sympathy allowance.
> otherwise....
>
> FTR a 50/50 mix provides protection down in the neighborhood of -34F.
> The 70/30 blend is good 'till about -84 F. If you don't believe it, the
> answer is as simple as checking the back of an EG antifreeze bottle
> sometime. The truth will set you free...:)
You are absolutely right. A 50/50 Mix of antifreeze is what usually ships
in new cars, but if you live in international falls or some place like
that, you may want to deviate from the original spec. Also, the reason for
not using more antifreeze than you need is that antifreeze does not carry
as much heat, and does not give it up as easily. Thus a coolant too rich
in antifreeze might cause overheating (arguably, the cooling system would
have to have an inadequate safety margin for this to happen).
--
Please remove the spam defeating string from my email to reply.
JCWCONSULT
50/50 mix is good for about -30/35 F and that suits most of the USA. The best
mix, as pointed out earlier is 2/3rds glycol to 1/3rd water which is good for
driving at about -60F.
Now, what do you do if you are the fleet manager in Alaska or Siberia and
expect to use your trucks and bulldozers at -80/-90 F? Glycol antifreeze
simply is not effective at those temperatures, so what do you use in your
trucks and bulldozers to allow them to be safe?
Regards,
Jim Walker
I3DSPARKY
In article <19980104021...@ladder02.news.aol.com>, jcwco...@aol.com
(JCWCONSULT) writes:
>Now, what do you do if you are the fleet manager in Alaska or Siberia
>and
expect to use your trucks and bulldozers at -80/-90 F? Glycol
>antifreeze
simply is not effective at those temperatures, so what do you use
>in your
trucks and bulldozers to allow them to be safe?
At those extremes, does your engine even NEED coolant? =:-)
i3dSparky@ aol.com
JCWCONSULT
Re: my question on antifreeze for temps of -80/-90 F, well below what glycol
will handle:
i3dSparky said:
At those extremes, does your engine even NEED coolant? =:-)
Dick Brewster said:
You don't let them get that cold. Keep them sheltered and at a
nice warm -65F or keep them running, or use heaters to keep the
lubed parts and fuel warm.
Fortunately, prolonged periods of -80/-90 aren't too common.
--------------------------
You do need coolant at those temps to prevent hot spots and warpage in the
engine, and the process of keeping the machines pre-warmed is not effective for
several-hour periods of outside use -- such as in mining operations.
The answer I read some years ago is to use kerosene for coolant. Refined
kerosene will not freeze until something south of -100F and at temps of -50+ F,
it is so far below its flash point that there is no danger of fire.
It would, however, be pretty smelly if you had a pinhole leak in the cabin's
heater core.
Regards,
Jim Walker
Chris Hill
In article <jjvantol-030...@ppp0029.ms.centuryinter.net>,
jjva...@nospam.cc.memphis.edu (Joshua Van Tol) wrote:
> > FTR a 50/50 mix provides protection down in the neighborhood of -34F.
> > The 70/30 blend is good 'till about -84 F...
>
> You are absolutely right... Also, the reason for
> not using more antifreeze than you need is that antifreeze does not carry
> as much heat, and does not give it up as easily. Thus a coolant too rich
> in antifreeze might cause overheating (arguably, the cooling system would
> have to have an inadequate safety margin for this to happen).
Here's another reason: a crazy little thing called "molal freezing point
depression" - one of the few things I remember from high school chemistry
class. In that lab experiment, we used various mixtures of isopropanol and
water, and documented the fact that the freezing point is lowest at some
intermediate ratio - 60% or 70%, I forget. The point being that (by
extension) pure antifreeze has a *higher* feezing point than the optimal
antifreeze/water mix. At some point, increasing the proportion of
antifreeze will give you *less* protection against freezing.
--
Chris jchillatdgsysdotcom
What would happen if I pulled the plug on the Reality Engine?
George Jefferson
::Around 70% does give the lowest freezing point (I think it is
::about -90F, if it's off by a couple of percentage points (higher
::OR lower), it freezes at about -60F.
:Guess you'll have to document this one! I've seen graphs of the
:ratio vs. the freeze point, and I believe 50/50 was the lowest
:freeze point.
be that as it may, since glycol doesn't expand on freezing who cares
if it freezes. Any mixture to the rich side of the "optimum" point
should be fine for ultimate freeze protection. Though if I had to
think about -60F I would move.
--
george jefferson : geo...@sol1.lrsm.upenn.edu
to reply simply press "r"
-- I hate editing addresses more than I hate the spam!
George Jefferson
:Now, what do you do if you are the fleet manager in Alaska or Siberia and
:expect to use your trucks and bulldozers at -80/-90 F?
is heat transfer capacity an issue once it gets that cold? Well, I guess
if you want to heat the cab it is..
George Jefferson
:If the radiator is frozen, can overheat the engine before the
:frozen glop in the radiator melts.
ahh..good point.
:And, a water/glycol mix does expand.
past the 70% mark? Ah well, purely academic as far as I'm concerned.
David & Cyn
> The main reason for using 50/50 is that the heat transfer capability of
> antifreeze is significantly less than that of water. The 50/50 mix gives
> the best compromise of freeze/boil protection and heat transfer for the
> average year-round user.
>
> If your car has a cooling system that's well over the required capacity, you
> might be able to use 70/30 or even 100% antifreeze successfully in most
> conditions. Personally, unless there was a cold-weather reason to use more
> anti-freeze, I wouldn't exceed 70%.
.
If you want to be safe under the coldest conditions use a mix of
50/50. If the temp drops below the freezing point of the 50/50 mix a
small amount of the WATER will freeze into very small crystals and the
remaining mixture, still a very pumpable liquid for the most part will
be a higher ratio of anti freeze to water, 51/49 and will require a
lower temperature for more water to freeze out.
It is better to have a ratio lower in anti freeze and higher in water
then recommended for the maximum protection, because as it gets colder
and some of the water freezes out you will reach the maximum protection
ratio, if the temperature drops past that you are SOL.
If you start with a high concentration of anti freeze you will already
be on the down slope of the freezing curve and will never be able to get
maximum protection.
Of course better still would be to have the exact correct max
protection ratio, but since this is difficult to determine and
impossible to maintain be sure to error on the side of EXTRA WATER and
not extra anti freeze.
George Jefferson
:If the temp drops below the freezing point of the 50/50 mix a
:small amount of the WATER will freeze into very small crystals and the
:remaining mixture, still a very pumpable liquid for the most part will
:be a higher ratio of anti freeze to water, 51/49 and will require a
:lower temperature for more water to freeze out.
wouldn't the same happen with excess antifreeze? Except that the
small amount of ethelye glycol that freezes out first won't
expand and break things..
David & Cyn
> :If the temp drops below the freezing point of the 50/50 mix a
> :small amount of the WATER will freeze into very small crystals and the
> :remaining mixture, still a very pumpable liquid for the most part will
> :be a higher ratio of anti freeze to water, 51/49 and will require a
> :lower temperature for more water to freeze out.
>
> wouldn't the same happen with excess antifreeze? Except that the
> small amount of ethelye glycol that freezes out first won't
> expand and break things..
I don't think so because the ethylene glycol has a lower freezing point
(doesn't it? I don't know for sure). The water will freeze out till
there is 100% ethylene glycol and then it will freeze. You will never
be able to reach the maximum freezing point of the mixture this way.
Steve Zinski
Here's what's posted on Prestone's web site:
http://www.prestone.com/faq/index.html
Q: What is the best antifreeze/coolant concentration for a vehicle? Can I
use 100% antifreeze?
A: We recommend that you use between a 50% and 70% concentration of
antifreeze. At least 50% is necessary to give the adequate amount of
corrosion protection, as well as freeze/boilover protection. However, we
do not recommend more than 70% antifreeze. This would cause restriction
of the heat transfer capabilities, corrosion protection, and freeze
protection.
Here's what I found at Sierra's web site:
http://www.safebrands.com/#3
Boilover and Freeze-up Protection
Freeze Boiling
AF Water Point Point
----- ----- ------ -------
40% 60% -4°F 249°F*
50% 50% -26°F 256°F*
60% 40% -54°F 261°F*
66% 34% -76°F 262°F*
*Closed System; 14 psi caps
--Steve
--
=============================================================
To reply via email, remove 'nospam.' from my address:
szi...@nospam.richmond.edu
David Heisterberg
In article <34B2AB...@erols.com>, David & Cyn <qaz...@erols.com> wrote:
>(doesn't it? I don't know for sure). The water will freeze out till
>there is 100% ethylene glycol and then it will freeze. You will never
>be able to reach the maximum freezing point of the mixture this way.
Doesn't work that way. As the temperature of a 50/50 mix is lowered,
water will freeze out until the eutectic composition (about 68% glycol)
is reached. After that, the mixture will freeze without any further
change in composition.
Dave Heisterberg
David & Cyn
Yes, I agree. And that is exactly why it is much better to have a
mixture less then 68% glycol to start with, or as I stated earlier,
error on the side of too much WATER such as a 50/50 mix to start with
and not the OTHER SIDE OF THE CURVE like 70% or more glycol. Do you
agree, this is the way to get maximum cold weather protection short of
an exact 68% mixture?
Luke Nelson
In article <MPG.f163700b...@nntp.netcruiser>,
Dick Brewster <email.ad...@end.of.message.com> wrote:
>In <68hse1$4fd$1...@nyx10.nyx.net>, Luke Nelson of lne...@nyx.net
>wrote:
>> That is funny, in my stock International-Harvester maunaul, it says go
>> witha 50/50 mix unless you are going to experience temps -20 or lower,
>> than go with 100% antifreeze. so I go with 100% and have never had a
>> boilover or frezeup. What would make International different? *they do
>> have obscenely huge raiditors*
>>
>> Luke
>>
>
>referring to a pre-mix coolant that they sell under some trade
>name? That way they can charge you for the water that is in the
>coolant pre-mix.
yes, let me see if I can findmy manual here.
allright, here it is :)
The cooling system of your new vehicle is filled at the factory with I.H
Permant-Type Antifreeze and will protect the cooling system down to -20F
This factory-fill collant soulution is formulated to withstand one full
year of normal operation without draining.
Be sure to check the antifreeze protection level before cold weather. Use
only I'H Permant_type antifreeze or Ethylene-Glycol antifreeze with a
50-50 mix (50% antifreeze to 50% distilled water) Antifreeze can be added
undiluted if protection below -20F is required
later on in the section on draining and re-filling the raiditor it says a
50-50 mis, but may be used undiltued for protection at -20.
It should also be noted that the Scout and Travelall both have the
incresed capacity raidiors - which hold roughly 6 gallons not counting the
reserve jug - which hold another gallon(it is a huge bottle) So I got 7
gallons of antifreeze in that thing.
Also, maybe I am wrong, but isn't pre-mixed antifreeze a newer invention?
Or was it advaliable 30 years ago when my Travelall was built?
Anyway, that is what it says,
Luke
and I agree, it is hard to kill the beast (not that I want too :)
>
>As I recall, 100% ethylene glycol will freeze at some temperature
>near near 0F or -10F, I don't remember the exact number or have
>any references for pure ethylene glycol properties handy. It
>freezes into a slushy looking mess and has to get a fair amount
>colder before it gets very solid. It is also a lot more viscous
>than water, and doesn't take as much heat to thaw. That's
>probably why you get away with it in your International. That and
>the fact that you can't kill one of those beasts with a sledge
>hammer.
>
>Regards,
>
JCWCONSULT
Glycol antifreeze at 50-50 is good for about -30/35 F.
At 2/3rds glycol to 1/3rd water, it is good for about -60/65 F
At 100% glycol, it only protects to about 0 F.
The recommendation to add 100% glycol is meant to increase protection for a
system that started at 50-50, not for a fresh fill from empty.
Regards,
Jim Walker
David Heisterberg
In article <34B2C7...@erols.com>, David & Cyn <qaz...@erols.com> wrote:
>error on the side of too much WATER such as a 50/50 mix to start with
>and not the OTHER SIDE OF THE CURVE like 70% or more glycol. Do you
>agree, this is the way to get maximum cold weather protection short of
>an exact 68% mixture?
I think you're making things more difficult than they need to be.
First, if you started with, say, 80% glycol, as it gets colder
pure glycol will freeze out until the eutectic is reached. I
don't really see how one way is much better than the other.
I think you'd be much better off using the composition that
the manufacturer recommends for the conditions you're likely
to see. As I've never personnally experienced temperatures
lower than -20F (and it's almost +60 today!) it's just
academic from my point of view.
Dave Heisterberg
s.coley
The following is from the Dodge truck shop manual.
"The corrosion inhibiting additives in ethylene-glycol need the presence
of water to dissolve. Without water, additives form deposits in system.
These act as insulation causing temperature to rise as high as 149 C.
(300 F). In addition, 100% ethylene-glycol freezws at -22 C, (-8 F)."
I'm just glad I live in an area where I dont have to worry about any
temp below 20 degrees or so. g-luck to all. sam c.
Mark Mathys
> > E. Sturm wrote:
> > >
> > > Does anyone know the reason why antifreeze to water ratio in a car
50-55 percent glycol provides good protection in most climates but 65% is
usually considered the maximum except when operating at high altitudes.
Several reasons I know are freeze point, heat transfer, and solubility of
additives. Pure ethylene glycol has a specific heat of about 0.57, a 50:50
water mix is about 0.88, and pure water is 1.0. Pure water will carry more
heat but it is corrosive to cooling systems.
Pure ethylene glycol freezes around -12 (don't have exact value handy) and
for obvious reasons shouldn't be used at low temperatures.
The solubilty of corrosion-control and other additives is also a factor.
More glycol means less water. As the glycol concentration goes up, the
solubility of certain additives decreases and they tend to drop out of
solution. Some additives are abrasive and cause premature wear. Others form
sludge and/or scale that either plugs passages or acts as insulation. A
1/16 inch layer of scale can reduce heat transfer by 40%.
Using color as a indicator or quality and freeze point are both pretty poor
indicators of coolant quality. Ethylene glycol beaks down to form glycolic
acid, oxalic acid, formic acid, and carbon dioxide or carbonic acid. Being
acids these all lower the pH of the coolant (but still depress the freeze
point). If the pH falls below 7 ferrous metals corrode. If it goes above 11
aluminum corrodes.
It is best to change your coolant at the recommended interval, or at least
have it analyzed (most Caterpillar Dealers can do it for about $8.00). The
best coolants to use are the new extended life coolants. Not only do they
last 2 to 3 times as long but they offer superior corrosion/errosion
protection. Most also come as 50:50 premixed solutions. This avoids the
problems of bad water. Much of the water that is fit to drink isn't fit for
use in cooling systems.
Hope this helps
Mark
This article was posted from <A HREF="http://www.slurp.net/">Slurp Net</A>.
Jim
Mark, Excellent posting. Thanks
Jim in Md.
John Watkins
Water pumps have a hard time circulating straight coolant !!!
SPAM_ME_N...@ibm.net
I think the old GM aluminum v8 (now rover) used 100% antifreeze, for
corrosion reasons.
> Jim in Md.
--
GZ
from New Haven,
epicenter of the dystopia