Product Tested

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Warren Oil Company, Inc.

Company and Product Information

Corporate Office:
Dunn, NC


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.


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.

Coastal SAE 30 ND
API SA Non-Detergent

API SA Non-Detergent

Marketed by: Warren Oil Company, Inc.

Purchased at: Sandy Spring, MD

Date of purchase: 1/25/2015


Website(s): www.warrenoil.com

Test Results and Assessment:

The results of the tests conducted on this sample meet the SAE J300 specifications for the SAE Viscosity Grade listed on the product label, and are consistent with the listed API Service Categories.


bottle icon Physical Properties pass
Elemental Analysis pass
Labeling warning

Note: Although laboratory tests alone cannot be used to establish if engine oil meets an API Service Category, they can be used to determine if it doesn't.

PHYSICAL TESTS (click for test details) - a Standard Coastal
TBN, mg KOH/g (ASTM D2896) 0.98
Viscosity @ 100ºC, cSt (ASTM D445) 9.3 to <12.5 11.3
Viscosity @40ºC, cSt (ASTM D445) 140
Viscosity Index (ASTM D2270) 51
Viscosity @-20ºC mPa s (cP) (ASTM D5293) N/A N/A
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium 15
Magnesium 3
Phosphorus, ppm   10
Zinc, ppm 12
Molybdenum,  ppm 0
Barium, ppm
Boron, ppm 0
Silicon, ppm 0
Potassium, ppm 0
Manganese, ppm 0
Titanium, ppm 0
Copper, ppm 0
Sodium, ppm 0
Vanadium, ppm 0
Silver, ppm 0
Aluminum, ppm 0
Chromium, ppm 0
Iron, ppm 0
Nickel, ppm 0
Lead, ppm 0
Antimony, ppm 0
Tin, ppm 0
  1. Standards, shown in yellow are established by API, SAE and others.
  2. Test Method for metal analysis is ASTM D5185.
  3. This specification is expressed to two significant figures, therefore results up to 15.5 are considered on specification.