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PETROLEUM QUALITY INSTITUTE OF AMERICA
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Petroleum Quality Institute of America

Antifreeze/Coolant Test Program

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.

Consolidated 2015 Antifreeze/Coolant

Click Bottles Below for Data and Assessments
 
Pre-Diluted Antifreeze/Coolant

Test Results for Antifreeze/Coolants 

 

CLICK BOTTLES FOR DETAILS

Brand All Temperature AutoZone CarQuest Metro Performance Polar Zone Prestone Prime PROLine STP Ultra Guard ZECOL Zerex
Antifreeze/Coolant Description PRE-MIXED

Extended Life Universal 50/50 Pre-Diluted

50/50 Pre-Diluted Extended Life -20oF Formula Ready-To-Go 50/50 Premixed Green/Traditional

Permanent Premixed Formula/ Protects to -10oF

50/50 Prediluted Extended Life Technology 50/50 Prediluted Extended Life 50/50 Prediluted Global Extended Life 50/50 Pre-diluted "Winter-All Season Ready To Use" Multi-Max Extended Life 50/50 Prediluted 50/50 Pre-Mixed G-05 Formula
PHYSICAL PROPERTIES AND CHEMICAL ANALYSIS
Percent Antifreeze, (Based on Percent Glycol) 50 50 50 48 44 Not Rated 50 52 50 50 33 51 52
Freeze Point, (ASTM D3321) in oF -34 -34 -34 -30 -20 -6.9-a -34 -40 -34 -34 10.9-a -37 -40
Bitterant, (ASTM D7704) in ppm 22 24 23 Not Detected 4 Not Detected 41 41 39 60 6 75 42
pH, (ASTM D1287) 9.08 9.06 8.76 9.01 12.03 11.9 8.16 8.61 9.08 7.71 6.46 8.24 7.65
Color, (Visual) Green Yellow Yellow Green Green Fluorescent Green Yellow Yellow Yellow Yellow Green Green Yellow
Chloride and Other Anions by Ion Chromatography (ASTM D5827)
Glycolate, ppm Not Detected Not Detected Not Detected 24 331 Not Detected Not Detected Not Detected Not Detected Not Detected 2,623 1,326 Not Detected
Formate, ppm Not Detected Not Detected Not Detected 61 393 Not Detected Not Detected Not Detected Not Detected Not Detected 2,333 234 Not Detected
Chloride, ppm 24 24 1 227 115 8 4 8 13 2 367 1 Not Detected
Sulfate, ppm 3 18 Not Detected 665 627 19 7 13 14 Not Detected 145 11 Not Detected
Nitrite, ppm Not Detected Not Detected Not Detected 2,765 1,470 141 Not Detected Not Detected Not Detected Not Detected 131 1,315 1,311
Nitrate, ppm Not Detected Not Detected Not Detected 2 207 5 Not Detected Not Detected Not Detected Not Detected 168 446 1,360
Phosphate, ppm Not Detected Not Detected Not Detected Not Detected Not Detected Not Detected 1,040 Not Detected Not Detected Not Detected 219 Not Detected Not Detected
a. ASTM D1177