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The shear stability laboratory test method CEC L-14-A-93 and ASTM D 6278 offered by Southwest Research Institute (SwRI) evaluates the shear stability of polymer-containing 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/B1-08 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-14-A-93
Test Parameters
Polymer-containing oil is sheared by passing 170 mL through a diesel-injector nozzle and a two-cylinder fuel injection pump system for 30 cycles. Kinematic viscosities are measured on the sheared and unsheared oil samples in accordance with ASTM D 445 at 100°C. A percentage reduction is calculated from the viscosity results generated. The injection system is adjusted to ensure a viscosity reduction of 2.8 ± 0.1 mm²/s for a specific reference fluid. Once the equipment has been calibrated, other polymer-containing fluids may be run to evaluate the shear stability.
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The injection system is adjusted to ensure a viscosity reduction of 2.8 ± 0.1 mm²/s for a specific reference fluid. |
Once the equipment has been calibrated, other polymer-containing fluids may be run to evaluate the shear stability. |
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 | |||||
| Test Method | Properties | Limits | |||
| A1/B1-08 | A3/B3-08 | A3/B4-08 | A5/B5-08 | ||
| 100°C Viscosity After 30 Cycles (mm2/s) | |||||
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CDC
L-14-A-93 or ASTM D 6278 |
Xw-20 | Stay in Grade |
All Grades to Stay in Grade |
All Grades to Stay in Grade |
All Grades to Stay in Grade |
| Xw-30 | ≥9.3 | ||||
| Xw-40 | ≥12.0 | ||||
| Gasoline and Diesel Engines with Aftertreatment Devices | |||||
| Test Method | Properties | Limits | |||
| C1-08 | C2-08 | C3-08 | C4-08 | ||
|
CDC
L-14-A-93 or ASTM D 6278 |
100°C Viscosity After 30 Cycles (mm2/s) |
All
Grades to Stay in Grade |
All
Grades to Stay in Grade |
All
Grades to Stay in Grade |
All
Grades to Stay in Grade |
| Heavy-Duty Diesel Engines | |||||
| Test Method | Properties | Limits | |||
| E4-08 | E6-08 | E7-08 | E9-08 | ||
|
CDC
L-14-A-93 or ASTM D 6278 |
Viscosity
After 30 Cycles Measured at 100°C (mm2/s) |
Stay in Grade | Stay in Grade | Stay in Grade | Stay in Grade |
| ASTM D 6278 |
Viscosity
After 90 Cycles Measured at 100°C (mm2/s) |
Stay in Grade | Stay in Grade | Stay in Grade | Stay in Grade |
*Association des Constructeurs Européens d'Automobiles/European Automobile Manufacturers Association.
For more information about shear stability evaluation (CEC L-14-A-93 and ASTM D 6278) 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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Shear Stability Evaluation (CEC L-14-A-93 and ASTM D 6278) (210) 522-3652 |
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Related Terminology |
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CEC L-14-A-93 ASTM D 6278 shear stability test ACEA laboratory tests ACEA 2008 specifications shear stability of polymer-containing oils standardized lubricant testing engine lubricant |
| 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 12 technical divisions.
November 11, 2009