Product Tested

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Ozark Automotive Distributors

Company and Product Information

Corporate Office:
Ozark Automotive Distributors
233 S Patterson Ave
Springfield, MO 65802



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.

O'Reilly Full Synthetic
SAE 5W-20 dexos1

Product: O'Reilly Full Synthetic
Viscosity Grade: SAE 5W-20
Labeling: API SN/ILSAC GF-5/dexos1

Distributed By: Ozark Automotive Distributors, Springfield, MO

Purchased at: Arlington Heights, IL

Date of purchase: 2/17/2016


Website(s): www.oreillyauto.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 O'Reilly
TBN, mg KOH/g (ASTM D2896) 9.17
Viscosity @ 100ºC, cSt (ASTM D445) 6.9 to <9.3 8.31
Viscosity @40ºC, cSt (ASTM D445) 44.64
Viscosity Index (ASTM D2270) 164
Viscosity @-30ºC mPa s (cP) (ASTM D5293) 6,600 Max 4,271
Volatility, mass % loss, 1 hr, @ 250ÂșC (ASTM D5800) 15 Max -c 9.3
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium 2,269
Magnesium 10
Phosphorus, ppm 600 to 800 -d 808
Zinc, ppm 865
Molybdenum,  ppm <1
Barium, ppm <1
Boron, ppm 1
Silicon, ppm 4
Potassium, ppm <5
Manganese, ppm <1
Titanium, ppm <1
Copper, ppm <1
Sodium, ppm 497
Vanadium, ppm <1
Silver, ppm <1
Aluminum, ppm <1
Chromium, ppm <1
Iron, ppm 1
Nickel, ppm <1
Lead, ppm <1
Antimony, ppm <1
Tin, ppm <1
  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.
  4. ASTM Test Method Reproducibility: 540 to 880 ppm. Therefore, results between 540 and 880 ppm are meets specification.