04-12-2008, 08:54 AM
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#1
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ALEROMOD RAPIST
Join Date: Nov 2003
Location: New Jersey
Posts: 7,971
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Mixing regular anti-freeze with Dex-Cool?
This might fall under the "dumb as dirt" questions category, but...
Since my car is now throwing off the Low Coolant light for a few seconds every time I start the car, what would the real harm be in mixing regular anti-freeze in with the Dex-Cool that's already in the car?
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1990 Sunoco Super Challenge Points Series - Trophy Stock Points Champion
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04-12-2008, 09:32 AM
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#2
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GL Member
Join Date: Jul 2007
Location: Loring, Ontario, Canada
Posts: 579
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I've heard a few different things, all of them not good like it congealing (sp?) and plugging up stuff like your rad and heater core, I've also heard that it'll mix and then corrode aluminum(not to sure on the valididy of that one).
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2003 Alero
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Grey
1996 GMC Yukon 4x4
5.7 liters of gas suckin power! 
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04-12-2008, 09:56 AM
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#3
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GLS member
Join Date: Jun 2006
Location: dayton, ohio
Posts: 1,100
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i'm pretty sure it'll get really thick.
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04-12-2008, 10:10 AM
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#4
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Owner
Join Date: Nov 2003
Location: Joliet, IL
Posts: 19,932
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dumb as dirt ain't the word............. it will screw your shit up. the 2 do not mix well at all.
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04-12-2008, 10:58 AM
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#5
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Aleromod Old Fart & Owner
Join Date: Feb 2006
Location: Kerrville, Texas
Posts: 8,114
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It will turn to sludge very shortly!
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Final 500 #448-OCA Preservation Class Winner, Final 500 Alero #219, '02 Bravada
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04-12-2008, 11:38 AM
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#6
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Aleromod part owner
Join Date: Nov 2003
Location: Far Northeast Philadelphia, PA
Posts: 18,199
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Mitch, you're just going to have to put up the extra $4 for the gallon of Dexcool v regualer Prestone 
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33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
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04-12-2008, 11:41 AM
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#7
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Keepin it Real
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 12,522
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or just add some water if you are only missing a little bit.
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2015 Audi SQ5
2000 Alero GLS Coupe - still in the family, but I don't drive it anymore
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04-12-2008, 11:53 AM
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#8
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Quote:
Originally Posted by jackal2000
or just add some water if you are only missing a little bit.
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Yep. I have mostly water in mine now....trying to clean out all the Dex-crap so when I rebuild the motor I don't have anything contaminating the old green stuff. |
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04-12-2008, 11:54 AM
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#9
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Hot and Fluffy.
Join Date: Aug 2007
Location: Alberta, Canada
Posts: 1,699
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Wait... Am I supposed to be using Dexcool?
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04-12-2008, 12:30 PM
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#10
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Keepin it Real
Join Date: Nov 2003
Location: Alexandria, VA
Posts: 12,522
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Quote:
Originally Posted by meadus101
Wait... Am I supposed to be using Dexcool?
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dex-cool or the stuff that is any make/model which is basically the same price as dex-cool.
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2015 Audi SQ5
2000 Alero GLS Coupe - still in the family, but I don't drive it anymore
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04-12-2008, 12:40 PM
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#11
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GL Member
Join Date: Feb 2007
Location: INDIANA
Posts: 263
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Its called mississippi mud and at running temperature its fine but it will gel up
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04-12-2008, 01:45 PM
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#12
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GLS member
Join Date: Aug 2006
Location: Grand Forks, ND for school; Langdon, ND home
Posts: 2,632
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that wouldn't be a very smart idea. I'd just do a complete fluch and fill with prestone, thats what i did. it will be easier later on if you have to add again.
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04-12-2008, 02:34 PM
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#13
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Moderator
Join Date: Nov 2004
Location: Long Grove, IL
Posts: 5,002
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The official GM word on this is that it just reduces the life to that of standard antifreeze.
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Cliff Scott
2004 Alero GX w/sport pkg - Sold, living somewhere in WI now.
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1994 Chevy Beretta - Quad4/M5
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04-12-2008, 03:40 PM
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#14
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Aleromod's most pointless thread starter
Join Date: Aug 2007
Location: Jersey (north and south are 2 diff. states)
Posts: 2,349
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Quote:
Originally Posted by Cliff8928
The official GM word on this is that it just reduces the life to that of standard antifreeze.
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that is true and they also say to not mix the dexcool with other coolant........
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Quote:
Originally Posted by adam337
whats with all the useless threads lately?..
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New project 1992 460 big block ford notchback mustang
Goal - Mid 11s all motor.
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04-12-2008, 10:55 PM
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#15
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ALEROMOD RAPIST
Join Date: Nov 2003
Location: New Jersey
Posts: 7,971
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I have regular anti-freeze in the garage, but since I was out running errands today I ended up stopping by R&S Strauss and picking up a 50/50 mix of Dex-Cool. Added half a jug to my overflow tank.
Still don't understand why mixing the 2 would be bad. Kinda figured it was like the "only use Eagle-brand Goodyear tires on your vehicle"-type cross-promotional BS that we see with other products.
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04-23-2008, 10:51 PM
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#16
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Hot and Fluffy.
Join Date: Aug 2007
Location: Alberta, Canada
Posts: 1,699
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I'm really low on antifreeze, And there is stuff that's any make, any model.... but I guess I shouldn't mix it if there's any skepticals. Anwhere I can get this other than a Stealership?
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04-24-2008, 12:49 PM
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#17
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GX Member
Join Date: Feb 2008
Location: Vienna, VA
Posts: 30
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Extended life anti-freeze
According to Prestone and our mechanic, it is ok to mix DEX-COOL with the new "extended life" anti-freeze made by Prestone. This coolant was developed to be more of a "universal" coolant. This is NOT the same as the regular green coolant. This is more of a yellow color and provides the same extended life properties of DEX-COOL and is compatible. You can also mix the extended life coolant with the regular green coolant, but then it loses its extended life properties.
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