The Data Speak for Itself...
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Corporate Office:
1900 West Field Court
Lake Forest, IL 60045
Website(s):www.prestone.com
Headquartered in Lake Forest, Ill., Prestone manufactures and markets antifreeze/coolant, brake and power steering fluid, and other leading vehicle maintenance products. Prestone Antifreeze/Coolant has protected vehicle cooling systems since 1927 and now features patented Cor-Guard™ Inhibitors.
The Petroleum Quality Institute of America (PQIA) is an independent resource for information and insights on the quality of lubricants in the marketplace. Our mission is to serve the consumer of lubricants by randomly sampling and independently testing lubricants taken from the field. Test results are posted along with the brand names on the PQIA website. This webpage provides an analysis on the brand detailed below.
The following are the test results for the sample examined.
Manufactured by: Prestone Products Corporation in Lake Forest, IL
Purchased at: Edison, NJ
Date of purchase: 8/20/2015
Website(s): www.prestone.com
The test results for this product are consistent with its labeled claims.
|
Physical Properties |  |
| Chemical Analysis | |
|
| Labeling | |
Note: Although laboratory tests alone cannot be used to establish if coolant meets standards, they can be used to determine if it doesn't.
| Physical Properties and Chemical Analysis | Prestone |
| Percent Antifreeze, (Based on Percent Glycol) | 50 |
| Freeze Point, (ASTM D3321) in ⁰F | -34 |
| Bitterant, (ASTM D7704) in ppm | 41 |
| pH, (ASTM D1287) | 8.16 |
| Color, (Visual) | Yellow |
| Chloride and Other Anions by Ion Chromatography (ASTM D5827) | |
| Glycolate, ppm | Not Detected |
| Formate, ppm | Not Detected |
| Chloride, ppm | 4 |
| Sulfate, ppm | 7 |
| Nitrite, ppm | Not Detected |
| Nitrate, ppm | Not Detected |
| Phosphate, ppm | 1040 |