Product Tested

front label

Click above for larger image

back label

Click above for larger image

Warren Oil Company Inc

Company and Product Information

Corporate Office:
Warren Oil Company Inc
2340 US-301
Dunn, NC 28334

Website(s): www.warrenoil.com

Warren Oil Company was started in 1976 and is headquartered in Dunn, NC. The company is a leading independent lubricant manufacturer and marketer with distribution in all 50 states and exports going to 48 countries.   Warren Oil owns and operates packaging facilities in Dunn, NC, Benton, AL, San Antonio, TX, Johnstown, PA, Marion, IL, and West Memphis, AR. The company purchased three of its five plants from Pennzoil. All of Warren’s facilities are equipped to manufacture and package a diverse product slate ranging from automotive motor oils to charcoal lighter fluid. 

Warren Companies manufacture and package lubricants under several proprietary registered trademarks; e.g., Warren, Lubriguard, Autoguard, Itasca, Coastal, LubriGold and Saxon.

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.

AUTOGUARD 50/50 Ready To Use
Universal Antifreeze

AUTOGUARD 50/50 Ready To Use
Universal Antifreeze

Manufactured For: Warren Oil Company Inc, Dunn, NC

Purchased at: Chadbourn, NC

Date of purchase: 9/24/2015


Website(s): www.warrenoil.com

Test Results and Assessment:

The results of the tests conducted on this sample are consistent with the labeled claims.

bottle icon Physical Properties pass
Chemical Analysis pass
Labeling warning

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  AUTOGUARD
Percent Antifreeze, (Based on Percent Glycol) 51
Freeze Point, (ASTM D3321) in ⁰F -37
Bitterant, (ASTM D7704) in ppm 40
pH, (ASTM D1287) 9.27
Color, (Visual) Florescent Green
Chloride and Other Anions by Ion Chromatography (ASTM D5827)  
Glycolate, ppm Not Detected
Formate, ppm Not Detected
Chloride, ppm 7
Sulfate, ppm 1
Nitrite, ppm Not Detected
Nitrate, ppm Not Detected
Phosphate, ppm Not Detected