Product Tested

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Black Knight Products

Company and Product Information

Corporate Office:
Jasper, TX

Website(s): No Websites Found for Black Knight Products



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.

Black Knight SAE 40
Non-Detergent Motor Oil

Product: Black Knight
Viscosity Grade: SAE 40 Non- Detergent
Labeling: API SA/SB

Marketed By: Black Knight Products, Jasper, TX 
BLACK KNIGHT is a registered trademark of Smitty's Supply, Inc., Roseland, LA

Purchased at: Washington, D.C.

Date of purchase: 7/1/2015


Website(s): No Websites Found For Black Knight Products

Test Results and Assessment:


The label on this product states the oil "meets or exceeds car manufacturers' warranty requirements where an API Service SA/SB motor oil is recommended," In fact, NO car manufacturer's warranties recommend an SA or SB motor oil, and an oil cannot meet both of these service categories. API SA is not suitable for use in gasoline engines built after 1930 and API SB is not suitable for use in gasoline engines built after 1951. The label on this product fails to give adequate warning to consumers about its limited use. These are obsolete specifications and may cause harm in modern engines. The organometallic additive levels in this sample indicate the product is NOT suitable for use in the majority of automobile engines currently on the road.


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 Black Knight
TBN, mg KOH/g (ASTM D2896) 3.28
Viscosity @ 100ºC, cSt (ASTM D445) 12.5 to <16.3 13.9
Viscosity @40ºC, cSt (ASTM D445) 123
Viscosity Index (ASTM D2270) 111
Viscosity @-20ºC mPa s (cP) (ASTM D5293) N/A N/A
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium 683
Magnesium 86
Phosphorus, ppm   370
Zinc, ppm 418
Molybdenum,  ppm 20
Barium, ppm 1
Boron, ppm 22
Silicon, ppm 11
Potassium, ppm 5
Manganese, ppm 0
Titanium, ppm 1
Copper, ppm 0
Sodium, ppm 30
Vanadium, ppm 0
Silver, ppm 0
Aluminum, ppm 0
Chromium, ppm 0
Iron, ppm 2
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.