Petroleum Quality Institute of America

The Petroleum Quality Institute of America (PQIA) is an independent resource for information and insights on the quality and performance of lubricants in the marketplace.  Our mission is to serve the consumer of lubricants by reporting on the quality and integrity of lubricants in themarketplace.

 

 

 

 

 
 

Road-Tech Motor Oil 10W-40 API SN

Marketed by Salado Sales, Inc. Temple, TX

 

Purchased in: Wawa, White Haven, PA

Date of purchase: March 18, 2012

 

 

 

 

 

All tests conducted on this sample meet the specifications for API SN 10W-40 Engine oil.

 

 

 

 


 

The Standard below are for the latest specification (API SN GF-5), and the Ranges and Averages are based on the 13 major brands of API SN ILSAC GF-5 tested in September 2011. Click here for more on API Service Categories. 

 

PETROLEUM QUALITY INSTITUTE OF AMERICA

TEST PROGRAM
The ranges and averages shown in the table below are for
current specifications (API SN GF-5). Comparison of sample tested is shown at right.
PHYSICAL TESTS Standard/ranges-b Average-e Road-Tech
 TBN, mg KOH/g, (ASTM D2896) 6.1 to 8.3 7.2 8.5
 Viscosity @ 100ºC, cSt, (ASTM D445) 12.5 to 16.3 n/a 14.6
 Viscosity @ 40ºC, cSt, ASTM D445   n/a 96.1
 Viscosity Index (ASTM D2270)   n/a 157
 Viscosity @ -25ºC mPa s (cP) (ASTM D5293) 7,000 Max n/a 5,140
 Volatility, mass % loss, 1 hr, @ 250ºC (ASTM D5800) 15 Max 14.2 12.1
 ELEMENTAL ANALYSIS-c      
Additives
    Nitrogen μg/g (ASTM D-5762) 599 to 990 804.2 723
    Calcium, ppm  1,570 to 2,460 2,051 2,390
    Magnesium, ppm  6 to 46 12.3 10
    Phosphorus,  ppm 600 to 800 703 715
    Zinc, ppm  766 to 868 791 853
    Molybdenum,  ppm  <1 to 269 60 43
    Barium, ppm  <1 <1 <1
 
    Boron,  ppm  <1 to 237 79 4
    Silicon,  ppm-d  3 to 9 5 4
    Potassium, ppm 9 to 17 11 15
    Manganese, ppm  <1 <1 <1
    Titanium, ppm  <1 to 114 11 <1
    Sulfur, ppm   2,785 3,531
    Copper, ppm  <1  <1 <1
    Sodium, ppm  5 to 454 172 <5
    Vanadium, ppm  <1 <1 <1
Contaminants
    Silver, ppm  <1 <1   <1
    Aluminum, ppm  <1 to 3 1   1
    Chromium, ppm  <1 <1   <1
    Iron, ppm  <1 to 1 1   <1
    Nickel, ppm  <1 <1   <1
    Lead, ppm  <1 <1   <1
    Antimony, ppm  <1 <1   <1
    Tin, ppm  <1 <1   <1

a- Click here for product label.

b- Standards, shown in orange, are established by API, SAE and others. Ranges, shown in teal, represent the high and low data for the 13 major brands of API SN ILSAC GF-5 tested in September 2011.

c-Test Method for metal analysis is ASTM D5185.

d- Although silicon is used as an antifoam additive in lubricants, concentrations above 7ppm have been linked to contamination from abrasive material,

e- Average of the 13 major brands of API SN ILSAC GF-5 tested in September 2011.

 

  
Road-Tech
The American Petroleum Institute sets forth a number of laboratory and engine tests required to meet an API SN ILSAC GF-5  performance specification. Although laboratory tests alone cannot be used to establish if an engine oil meets API SN, they can be used to determine if it doesn't.

The following is a comparison of the test results for the sample of Road-Tech tested with the API SN ILSAC GF-5 requirements.

 
Viscometrics

The viscometrics of the sample of Road-Tach tested meets the required targets for a 10W-40.

Viscosity @ 100șC, cSt, (ASTM D445)
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  Viscosity @ -25șC mPa s (cP) (ASTM D5293)
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 Click here for more on chart and Viscosity@100șC,cSt                Click here for about chart and Viscosity @ -25șC

   
Volatility Phosphorus
The volatility meets the requirements for an API SN designation.
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  The phosphorus content meets the requirements
for an API SN designation.
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Click here for more on chart and Volatilty Click here for more on chart and phosphorus
   
FRONT AND BACK LABELS FROM PRODUCT TESTED