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#490260 01/05/2009 8:47 PM
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'Bolter
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I am getting ready to move my '70 C10 out of the garage and into the driveway (wife wants to park inside). I checked the antifreeze and found that it is blue in color. Is this a different formulation from the standard yellow/green Prestone ethylene-glycol? Can I mix the blue with my Prestone?


53 Dumpy

1951 Chevy 3100 "Ernestine"
1970 Chevrolet C10 "Ol' Blue"
1940 JD "long-hood" B
1959 Jeep FC-170
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53 Dumpy #490288 01/05/2009 10:25 PM
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Sounds like windshield washer fluid?

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I've seen some of the stuff that they sell thats ready to go out of the jug that has a blue/green tint to it. You might want to get a antifreeze tester and check to see how it tests?

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The 50/50 pre-mix the county uses is a light red almost like tranny fluid. The colors are getting kinda confusing!

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And Propylene-Glycol pre-mix is Purple. (Not sure why I added that) May be the bump I took on the pumpkin today (ice - slip - bang)


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Raptor #490328 01/06/2009 12:54 AM
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check the compatability. I know if you mix standard EG with PG you get a really neat brown sludge.

My recommendations are to always flush and fill when switching brands. Too many additives lately.


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Might sound strange but BMW(brand) coolant for car and BMW motorcycle is BLUE, looks like wiper fluid, smells like wiper fluid, but is coolant. When using a coolant tester it tests like regular coolant, wiper fluid does not- (I was worried when The BMW bike My wife rides(liquid cooled) had blue coolant in the tank.

Last edited by Yelostn78; 01/06/2009 1:15 AM.



1949 Chevy 4400 Big Red
1949 Chevy 3600 Bob's Truck
1949 Chevy 3100 The Investment
1949 Chevy 3800 the Won Ton

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It tests with my coolant tester, so I assume it must be ethylene glycol. Hard to be believe that the 80 year old farmer that owned it before me used BMW coolantin it. Maybe his garage convinced him it was better than the good old green stuff. My goal was to lower the freeze point below the +10 degrees that it tests at now. Am I going to screw anything up if I drain the radiator and add Prestone to get the freezing point lowered?


53 Dumpy

1951 Chevy 3100 "Ernestine"
1970 Chevrolet C10 "Ol' Blue"
1940 JD "long-hood" B
1959 Jeep FC-170
1960 IH B275
2013 Chevy Silverado
2023 GMC Denali 2500HD
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I agree that a random farmer would have BMW coolant- Perhaps there is another brand that is offering blue coolant? I have seen some water pump lubricants the same blue color, and some diesel engine cooling system additives that are also blue(stops cavitation) Maybe it is coolant from a tractor/implement manufacture? A quick google search shows that most european coolant is blue or red. which does not really help out here. I would tend to leave the coolant pure- possibly different chemical combinations effect the colors - I would probably flush and switch to prestone green, or something that is regularly available to you.
Ford, I know not the most popular here has a diesel anti-cavitation additive(I have some in my garage for my 85 ford diesel, and it tints everything blue-green, if you use to much it is blue.
Hope this helps anyways-




1949 Chevy 4400 Big Red
1949 Chevy 3600 Bob's Truck
1949 Chevy 3100 The Investment
1949 Chevy 3800 the Won Ton


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