Product Tested

front label

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back label

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MidWest Petroleum Products

Company and Product Information

Corporate Office:
MidWest Petroleum Products
5841 W. 66th Street
Bedford Park, IL 60638

Website(s): www.midwestguard.com


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.

MidWest Guard SAE 5W-30
Synthetic Blend Motor Oil

Product: MidWest Guard
Viscosity Grade: SAE 5W-30
Labeling: API SN/ILSAC GF-5

Distributed By: MidWest Petroleum Products, Bedford, IL

Purchased at: Chicago Heights, IL

Date of purchase: 11/15/2016


Website(s): www.midwestguard.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.

Note: Whereas the back label on this product displays the API Service Symbol ("Donut"), the product is not currently (2/3/2017) listed as licensed on the API website.

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 MidWest Guard
TBN, mg KOH/g (ASTM D2896) 6.63
Viscosity @ 100ºC, cSt (ASTM D445) 9.3 to <12.5 9.94
Viscosity @40ºC, cSt (ASTM D445) 59.35
Viscosity Index (ASTM D2270) 154
Viscosity @-30ºC mPa s (cP) (ASTM D5293) 6,600 Max 5,761
Volatility, mass % loss, 1 hr, @ 250ÂșC (ASTM D5800) 15 Max -c 12.8
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium, ppm 1,894
Magnesium, ppm 8
Phosphorus, ppm 600 to 800 749
Zinc, ppm 788
Molybdenum,  ppm 39
Barium, ppm <1
Boron, ppm 176
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 2
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.