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Viscosity at high-temperature and high-shear rate laboratory evaluation method CEC L-36-A-90 is offered by Southwest Research Institute (SwRI) to determine the dynamic viscosity of oils at 120°C using a Ravenfield high-shear rate, tapered-plug viscometer.
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| Gasoline and Diesel Engines |
Gasoline and Diesel Engines with Aftertreatment Devices |
Heavy-Duty Diesel Engines |
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A1/B1-08 A3/B3-08 A3/B4-08 A5/B5-08 |
C1-08 C2-08 C3-08 C4-08 |
E4-08 E6-08 E7-08 E9-08 |
CEC L-36-A-90 Test Parameters
The lubricant being tested fills the annulus between a close-fitting rotor and stator. The rotor and stator have a gradual matching taper to allow adjustment of the gap and, hence, the shear rate. The rotor is spun at a known speed, and the lubricant viscosity is determined by comparing the measurements of the reaction torque to a reference line prepared using Newtonian calibration oils.
Pass/Fail
Criteria
The pass/fail criteria include maximum variation of characteristics after immersion for 7 days in fresh oil without pre-aging.
| Gasoline and Diesel Engines | ||||
| Property | Limits | |||
| A1/B1-08 | A3/B3-08 | A3/B4-08 | A5/B5-08 | |
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Viscosity at
150°C and 106s-1 Shear Rate, mPas |
xW-20– Min. 2.6 Max. 3.5 All Others Min. 2.9 |
≥3.5 | ≥3.5 |
Min. 2.9 Max. 3.5 |
| Gasoline and Diesel Engines with Aftertreatment Devices | ||||
| Property | Limits | |||
| C1-08 | C2-08 | C3-08 | C4-08 | |
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Viscosity at
150°C and 106s-1 Shear Rate, mPas |
≥2.9 | ≥2.9 | ≥3.5 | ≥3.5 |
| Heavy-Duty Diesel Engines | ||||
| Property | Limits | |||
| E4-08 | E6-08 | E7-04 | E9-04 | |
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Viscosity at
150°C and 106s-1 Shear Rate, mPas |
≥3.5 | ≥3.5 | ≥3.5 | ≥3.5 |
*Association des Constructeurs Européens d'Automobiles/European Automobile Manufacturers Association.
For more information about viscosity at high-temperature and high-shear rate evaluation (CEC L-36-A-90), 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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Viscosity at
High- (210) 522-3652 |
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Related Terminology |
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CEC L-36-A-90 viscosity at high-temperature and high-shear rate test lubricant analysis ACEA lubricant test ACEA 2008 specifications oil viscosity laboratory test standardized lubricant testing engine lubricants Association des Constructeurs Européens d'Automobiles |
| Petroleum Products 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.
December 28, 2012
