Product Tested

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Martin Lubricants

Company and Product Information

Corporate Office:
Martin Lubricants
484 East 6th Street
Smackover, AR 71762


Martin Lubricants is a leading independent manufacturer of lubricants produced under the Gard™, SynGard™, Xtreme™, and Unimark™ brands. Martin Lubricants operates two packaging facilities: a 235,000 sq. ft. facility in Smackover, Arkansas with 5.3 million gallons of bulk storage and a 75,000 sq. ft. grease manufacturing facility located in Kansas City, Missouri.

According to Martin Lubricants website, "In 2012, the blending and packaging business of Cross Oil was acquired by Martin Operating Partnership L.P. (MOP), a wholly-owned subsidiary of Martin Midstream Partners L.P. (NASDAQ: MMLP), who now operates the business under the name Martin Lubricants. In 2013, MOP acquired the assets of NL Grease, LLC, a Kansas City, Missouri, based grease manufacturer specializing in private-label packaging of commercial and industrial greases."


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.

SynGard Synthetic Blend SAE 5W-30

Product: SynGard 5W-30
VIscosity Grade: SAE 5W-30
Labeled: API SN/ILSAC GF-5

Marketed by: Martin Lubricants

Purchased at: Champaign, IL

Date of purchase: 1/5/2015


Website(s): www.martinlubricants.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 SynGuard
TBN, mg KOH/g (ASTM D2896) 7.5
Viscosity @ 100ºC, cSt (ASTM D445) 9.3 to <12.5 10.5
Viscosity @40ºC, cSt (ASTM D445) 62.8
Viscosity Index (ASTM D2270) 157.0
Viscosity @-30ºC mPa s (cP) (ASTM D5293) 6,600 Max 5955
Volatility, mass % loss, 1 hr, @ 250ºC (ASTM D5800) 15 Max -c 14.7
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium 2060
Magnesium 10
Phosphorus, ppm 600 to 800 735
Zinc, ppm 782
Molybdenum,  ppm 77
Barium, ppm <1
Boron, ppm 231
Silicon, ppm 3
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.