Product Tested

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Parkway Manufacturing & Trading Company

Company and Product Information

Corporate Office:
Parkway Manufacturing & Trading Company
San Antonio, TX 78218

Website(s): www.heb.com

PARKWAY MANUFACTURING & TRADING COMPANY and GTC are trademarks of HEB Grocery Company, LP. HEB Grocery Company, LP operates food grocery stores in Texas and Mexico. The company offers food and drink, health and beauty, home and kitchen, baby and toy, pet, outdoor and sports, entertainment and electronic, office and school, and clothing products, as well as flowers. It also serves customers via online. The company was founded in 1905 and is headquartered in San Antonio, Texas.
Source: Bloomberg

GTC Multi-Purpose
DexMerc® Automatic Transmission Fluid

Product: GTC Multi-Purpose
Labeled: DexMerc® Automatic Transmission Fluid

Distributed By: Parkway Manufacturing & Trading Company, San Antonio, TX

Purchased at: Livingston, TX

Date of purchase: 8/6/2018


Website(s): www.heb.com

Test Results and Assessment:

The results of the tests conducted on this sample are consistent with their labeled claims.

Exemplary Labeling
The Petroleum Quality Institute of America points out the back label on this product as an example of how a marketer can and should provide consumers with proper guidance about applications where the product can be used and where it should not be used. The PQIA encourages such labeling, especially when ATF products include such language as “Multi-Purpose,” “Universal,” “Multi-Vehicle” and others that can be interpreted by a consumer to mean it’s appropriate for use in virtually any automatic transmission.

bottle icon Physical Properties pass
Elemental Analysis pass
Labeling warning
Flash Point of a DEXRON III/MERCON Fluid in °C (ASTM D92)

The results of the Flash Point test conducted on this sample meet the requirements of Dexron III/Mercon.
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Viscosity @ 100°C, cSt (ASTM D445)

The results of the Kinematic Viscosity @ 100ºC test conducted on this sample meet the requirements of Dexron III/Mercon.
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Brookfield Viscosity @-40°C mPa s (cP)

The results of the Brookfield viscosity test conducted on this sample meet the requirements of Dexron III/Mercon.
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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 GTC
Flash Point in ºC (ASTM D92) 170/177 Min-c 217
Viscosity @ 100ºC, cSt (ASTM D445) 6.8 Min 7.1
Viscosity @40ºC, cSt (ASTM D445)   34.4
Viscosity Index (ASTM D2270) 175
Brookfield Viscosity @-40ºC mPa s (cP) (ASTM D2983) 20,000 Max 11,855
ELEMENTAL ANALYSIS (click for test details) - a, b
Calcium, ppm 8
Magnesium, ppm 2
Phosphorus, ppm   148
Zinc, ppm 5
Molybdenum,  ppm <1
Barium, ppm <1
Boron, ppm 52
Silicon, ppm 3
Potassium, ppm 1
Manganese, ppm <1
Titanium, ppm <1
Copper, ppm <1
Sodium, ppm <1
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. DEXRON® III, 170°C minimum, MERCON®, 177°C minimum.