Product Tested

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Sopus Products

Company and Product Information

Corporate Office:
Sopus Products
Houston, TX 77210


Shell Oil Company US (SOPUS) is the United States-based subsidiary of Royal Dutch Shell. Royal Dutch Shell is one of the largest major oil companies in the worldSOPUS is a leading producer of oil and natural gas, gasoline, and petrochemical products in the US.

The company is also a leading manufacturer and marketer of motor oils and other automotive and industrial lubricants and products. In addition to Shell branded lubricants, Pennzoil-Quaker State Company, doing business as SOPUS Products, Inc., produces motor oils and other automotive products under the Pennzoil and Quaker State brand names.


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.

Quaker State Ultimate Durability
Full Synthetic SAE 5W-30 dexos1

Product: Quaker State Ultimate Durability Full Synthetic
Viscosity Grade: SAE 5W-30
Labeling: API SN/ILSAC GF-5 dexos1

Distributed by: SOPUS PRODUCTS, Houston, TX

Purchased at: Edison, NJ

Date of purchase: 12/28/2015


Website(s): www.quakerstate.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 Quaker State
TBN, mg KOH/g (ASTM D2896) 7.99
Viscosity @ 100ºC, cSt (ASTM D445) 9.3 to <12.5 10.19
Viscosity @40ºC, cSt (ASTM D445) 56.13
Viscosity Index (ASTM D2270) 172
Viscosity @-30ºC mPa s (cP) (ASTM D5293) 6,600 Max 3,996
Volatility, mass % loss, 1 hr, @ 250ºC (ASTM D5800) 15 Max -c 8.7
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium 2,268
Magnesium 8
Phosphorus, ppm 600 to 800 751
Zinc, ppm 850
Molybdenum,  ppm 252
Barium, ppm <1
Boron, ppm 4
Silicon, ppm 6
Potassium, ppm <5
Manganese, ppm <1
Titanium, ppm <1
Copper, ppm <1
Sodium, ppm 5
Vanadium, ppm <1
Silver, ppm <1
Aluminum, ppm 3
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.