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International Lubricant Evaluation • ACEA* Engine Evaluation
Viscosity at High-Temperature and High-Shear Rate Evaluation (CEC L-36-A-90)

 

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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.

 

image of Ravenfield high-shear rate, tapered-plug viscometer in use, performing a high-shear rate laboratory evaluation method at SwRI   image of Ravenfield high-shear rate, tapered-plug viscometer

Ravenfield high-shear rate, tapered-plug viscometer in use, performing a high-shear rate laboratory evaluation method at SwRI

 

Ravenfield high-shear rate, tapered-plug viscometer


ACEA 2008 Specifications

The viscosity at high-temperature and high-shear rate evaluation is part of ACEA 2008 Specifications:

 

Gasoline and Diesel Engines Gasoline and Diesel Engines
with Aftertreatment Devices
Heavy-Duty
Diesel Engines
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
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
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
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.

 

hitempshear.swri.org

 

Contact Information

Becky Grinfield

Viscosity at High-
Temperature and
High-Shear Rate Evaluation
(CEC L-36-A-90)

(210) 522-3652

bgrinfield@swri.org

hitempshear.swri.org

Related Terminology

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

 

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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