SwRI: Oil/Elastomer Compatibility Evaluation (CEC L-39-T-96), International Lubricant Testing, ACEA Lubricant Test

The oil and elastomer compatibility test method CEC L-39-T-96 offered by Southwest Research Institute (SwRI) determines the compatibility of lubricating oils and cured elastomers used in the automotive industry.


ACEA 2008 Specifications

The oil and elastomer compatibility test 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-39-T-96 Test Parameters

Test specimens are cut from slabs of the reference elastomer to be tested and are immersed in the oil being tested for a given period of time at a given temperature.

 

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 Elastomer Type
RE1 RE2-99 RE3-04 RD4 AEM (VAMAC)
Hardness DIDC, points -1/+5 -5/+8 -22/+1 -5/+5 As per Daimler-Chrysler
Tensile Strength, % -40/+10 -15/+18 -30/+10 -20/+10
Elongation at Rupture, % -50/+10 -35/+10 -20/+10 -50/+10
Volume Variation, % -1/+5 -7/+5 -1/+22 -5/+5

 

Gasoline and Diesel Engines with Aftertreatment Devices
Property Elastomer Type
RE1 RE2-99 RE3-04 RD4 AEM (VAMAC)
Hardness DIDC, points -1/+5 -5/+8 -22/+1 -5/+5 As per Daimler-Chrysler
Tensile Strength, % -40/+10 -15/+18 -30/+10 -20/+10
Elongation at Rupture, % -50/+10 -35/+10 -20/+10 -50/+10
Volume Variation, % -1/+5 -7/+5 -1/+22 -5/+5

 

Heavy-Duty Diesel Engines
Property Elastomer Type
RE1 RE2-99 RE3-04 RD4 AEM (VAMAC)
Hardness DIDC, points -1/+5 -5/+8 -25/+1 -5/+5 As per Daimler-Chrysler
Tensile Strength, % -50/+10 -15/+18 -45/+10 -20/+10
Elongation at Rupture, % -60/+10 -35/+10 -20/+10 -50/+10
Volume Variation, % -1/+5 -7/+5 -1/+30 -5/+5


 

*Association des Constructeurs Européens d'Automobiles/European Automobile Manufacturers Association.

 

For more information about oil/elastomer compatibility evaluation (CEC L-39-T-96) 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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Southwest Research Institute® (SwRI®) is an independent, nonprofit, applied engineering and physical sciences research and development organization with 12 technical divisions using multidisciplinary approaches to problem solving. The Institute occupies more than 1,200 acres and provides nearly two million square feet of laboratories, test facilities, workshops, and offices for more than 3,300 employees who perform contract work for industry and government clients.