Product Tested

front label

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back label

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J.D. Streett & Co., Inc.

Company and Product Information

Corporate Office:
Maryland Heights, MO 63043




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.

Pro Force SAE 10W-30

Product: Pro Force
Viscosity grade: SAE 10W-30
Labled: API SF/CC

Marketed by: J.D. Streett & Co., Inc.

Purchased at: Bradley, IL

Date of purchase: 1/5/2015


Website(s): /www.jdstreett.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.

BUT... there is more to consider.

Whereas the Pro Force product PQIA tested meets the viscosity requirements for an SAE 10W-30, it is important to understand the language on the back label of this product. To those that take the time read it, they will see the back label states this product "Meets or exceeds requirements for vehicles built prior to 1988, API Service classification SF/CC." That’s right; this product is formulated for use in cars built prior to 1988; cars that were built over 28 years ago and in some states qualify for 'historic" or "antique" registration with the DMV. This product is rated SF, which is an Obsolete Specification and according to the API is "not suitable for use in most gasoline-powered automotive engines built after 1988. May not provide adequate protection against build-up of engine sludge." See timeline for details.

With that said, read the labels on the oil you purchase to make sure it's the right oil for your car.


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 Pro Force
TBN, mg KOH/g (ASTM D2896) 4.5
Viscosity @ 100ºC, cSt (ASTM D445) 9.3 to <12.5 10.81
Viscosity @40ºC, cSt (ASTM D445) 70.2
Viscosity Index (ASTM D2270) 143
Viscosity @-25ºC mPa s (cP) (ASTM D5293) 7,000 Max 4883
Volatility, mass % loss, 1 hr, @ 250ÂșC (ASTM D5800) 15 Max -c 12.0
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium 1538
Magnesium 4
Phosphorus, ppm 476
Zinc, ppm 518
Molybdenum,  ppm 43
Barium, ppm <1
Boron, ppm 4
Silicon, ppm 9
Potassium, ppm <5
Manganese, ppm <1
Titanium, ppm <1
Copper, ppm <1
Sodium, ppm <5
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.