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Southwest Research Institute (SwRI) offers the viscometric properties laboratory evaluation, which checks the characteristics of formulated engine oils.
When formulating new engine oils or when there are significant changes in base oils or additives, the SAE J300 stable pour-point test method is used because it follows the previously established Society of Automotive Engineers (SAE) guidelines of -35°C max. for SAE 5W oils and -30°C max. for SAE 10W oils.
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| Gasoline and Diesel Engines |
Gasoline and Diesel Engines with Aftertreatment Devices |
Heavy-Duty Diesel Engines |
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A1/B1-04 A3/B3-04 A3/B4-04 A5/B5-04 |
C1-04 C2-04 C3-04 |
E2-96
Issue 5 E4-99 Issue 3 E6-04 E7-04 |
SAE J300 Test Parameters
A specified set of limits is used by
engine manufacturers to determine the engine oil viscosity
grades to be used in their engines and by oil marketers to
formulate, manufacture, and label products. Only products
that are within the relevant specifications may be
distributed.
After preliminary warming, the oil sample is subjected to a
controlled temperature/time cycle for 5-1/2 to 7 days. The
cycle was originally established to reproduce pour
instability or reversion that occurred during storage of
oils in moderately cold cyclic ambient conditions. More
recent work has shown relevance to engine oil pumpability
failure. Oils exhibiting pour reversion are essentially
"solid," resulting from wax gel formation at temperatures
significantly above their ASTM D 97 pour points.
Pass/Fail Criteria
No restriction except as defined by requirements of the shear stability and high-temperature/high-shear rate tests. Manufacturers may indicate specific viscosity requirements related to ambient temperatures.
For more information about viscometric properties
evaluation (SAE J300) capabilities at SwRI or how you can contract with SwRI,
please contact
Becky Grinfield at
bgrinfield@swri.org or
(210) 522-3652.
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Contact Information |
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Viscometric Properties Evaluation (SAE J300) (210) 522-3652 |
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Related Terminology |
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SAE J300 stable pour point evaluation ACEA laboratory evaluations viscometric properties evaluation lubricant analysis formulated engine oil characteristics ACEA 2004 specifications standardized lubricant evaluations engine lubricants Association des |
| Engine Lubricants Research Department | Fuels and Lubricants Research Division | SwRI Home |
Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 11 technical divisions.
September 30, 2008