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.






Xcel XHD Turbo 5W-30 5W-30 API SG/CF-4

Xcel Lubricants, Tampa, FL






Purchased in: I-Mart BP, Hagerstown, MD

Date of purchase: April 6, 2011 





Advisory:  Label may be easily misinterpreted by consumers. API SG is an obsolete specification. Engine oils labeled as such are designated for use in vehicles built prior to 1993.


Although the label on this oil displays no API symbol, the back label clearly states that the oil is “RECOMMENDED FOR ALL GASOLINE AND DIESEL ENGINES OF UNITED STATES, JAPANESE, AND EUROPEAN MANUFACTURERS." The label also says the product is recommended by 20 different vehicle manufacturers.  Whereas it is likely you will find your vehicle manufacturer on the label, unless you read and understand the last four words of the paragraph: when specifying API SG/CF-4," you could assume this engine oil is appropriate for your vehicle; it's not if your car was built after 1993. None of the referenced vehicle manufacturers recommend this oil for modern vehicles.







PHYSICAL TESTS Standard/ranges-b Average-e

Xcel XHD Turbo

 TBN, mg KOH/g, (ASTM D2896) 7.4 to 9.0 8.0 4.9
 Viscosity @ 100ºC, cSt, (ASTM D445) 9.3 to 12.5 10.39 10.92
 Viscosity @ 40ºC, cSt, ASTM D445 55.0 to 82.0 60.48 65.36
 Viscosity Index (ASTM D2270) 156 to 167 163 159
 Viscosity @ -30ºC mPa s (cP) (ASTM D5293) 6,600 Max 5,793 5,880
 Volatility, mass % loss, 1 hr, @ 250ºC (ASTM D5800)   13.5 18.2/19.0
    Nitrogen μg/g (ASTM D-5762) 720 to 1,000 860 83
    Calcium  1,648 to 2,301 2,043 1,752
    Magnesium, ppm  6 to 43 11 2
    Phosphorus,  ppm   772 474
    Zinc, ppm  789 to 887 851 517
    Molybdenum,  ppm  <1 to 226 93 0
    Barium, ppm  <1 <1 0
    Boron,  ppm  <1 to 246 84 6
    Silicon,  ppm-d  4 to 8 5 4
    Potassium, ppm  <1  <1 0
    Manganese, ppm  <1 to 8 1 0
    Titanium, ppm  <1 <1 0
    Sulfur, ppm  5,000 max 3,021 1,413
    Copper, ppm  <1  <1 0
    Sodium, ppm  <1 to 467 82 0
    Vanadium, ppm  <1 <1 0
    Silver, ppm  <1 <1 0
    Aluminum, ppm  <1 to 2 <1 0
    Chromium, ppm  <1 <1 0
    Iron, ppm  <1 to 1 1 0
    Nickel, ppm  <1 <1 0
    Lead, ppm  <1 to 1 <1 0
    Antimony, ppm  <1 <1 0
    Tin, ppm  4 to 5 5 2

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 major brands tested.

c-Test Method for metal analysis is ASTM 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 10 major brands tested. Click here for brands tested.



Xcel XHD Turbo 5W-30
The American Petroleum Institute sets forth a number of laboratory and engine tests required to meet an API SM performance specification. 

The API limits for each test are shown by the yellow bars. The test result for Xcel XHD Turbo 5W-30 are illustrated by the horizontal line.


The viscometrics of Xcel XHD Turbo 5W-30 meets the required targets for a 5W-30.


Volatility Phosphorus

Volatility and Phosphorus specifications are not established for this obsolete API Service Classification