|
|
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
Southwest Research Institute (SwRI) offers the shear stability laboratory test method, which evaluates the shear stability of polymer-containing oils.
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Gasoline and Diesel Engines |
Gasoline and Diesel Engines with Aftertreatment Devices |
Heavy-Duty Diesel Engines |
|
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 |
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.
 |
 |
|
|
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/B1-04 | A3/B3-04 | A3/B4-04 | A5/B5-04 | ||
| 100°C Viscosity After 30 Cycles (mm2/s) | |||||
|
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 | ≥8.6 | ||||
| Xw-40 | ≥12.0 | ||||
| Gasoline and Diesel Engines with Aftertreatment Devices | ||||
| Test Method | Properties | Limits | ||
| C1-04 | C2-04 | C3-04 | ||
|
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 |
| Heavy-Duty Diesel Engines | |||||
| Test Method | Properties | Limits | |||
|
E2-96 (Issue 5) |
E4-99 (Issue 3) |
E6-04 | E7-04 | ||
|
CDC
L-14-A-93 or ASTM D 6278 |
Viscosity
After 30 Cycles Measured at 100°C (mm2/s) |
Xw-30≥9.0 |
Stay in Grade |
||
| Xw-40≥12.0 | |||||
| Xw-50≥15.0 | |||||
|
Mono
Grades No Req. |
|||||
| ASTM D 6278 |
Viscosity
After 90 Cycles Measured at 100°C (mm2/s) |
Stay in Grade | |||
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.
*Association des Constructeurs Européens d'Automobiles/European Automobile Manufacturers Association.
|
Contact Information |
|
Shear Stability Evaluation (CEC L-14-A-93 and ASTM D 6278) (210) 522-3652 |
|
Related Terminology |
|
CEC L-14-A-93 ACEA laboratory tests shear stability test lubricant analysis shear stability of polymer-containing oils ACEA 2004 specifications standardized lubricant testing engine lubricants Association des Constructeurs Européens d'Automobiles European Automobile Manufacturers Association |
| Fuels and Lubricants Technology 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