This is an accelerated engine oil test, performed in a standardized, calibrated, stationary single-cylinder diesel engine that gives a measure of (1) piston and ring groove deposit forming tendency, (2) piston, ring and liner scuffing and (3) oil consumption. The test is used in the establishment of diesel engine oil specification requirements as cited in Specification D 4485 for appropriate API Performance Category C oils (API 1509). The test method can also be used in diesel engine oil development.
1.1 This test method covers and is required to evaluate the performance of engine oils intended to satisfy certain American Petroleum Institute (API) C service categories (included in Specification D 4485). It is performed in a laboratory using a standardized high-speed, single-cylinder diesel engine. Piston and ring groove deposit-forming tendency and oil consumption is measured. The piston, the rings, and the liner are also examined for distress and the rings for mobility.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Being an engine test method, this standard does have definite hazards that require safe practices (see Appendix X2 on Safety).
1.4 The following is the Table of Contents:
| Section |
|---|
| Scope | 1 |
| Referenced Documents | 2 |
| Terminology | 3 |
| Summary of Test Method | 4 |
| Significance and Use | 5 |
| Apparatus and Installation | 6 |
| Intake Air System | 6.2.1 |
| Exhaust System | 6.2.2 |
| Fuel System | 6.2.3 |
| Oil Consumption System | 6.2.4 |
| Engine Oil System | 6.2.5 |
| Oil Heating System | 6.2.5.1 |
| Oil Sample Valve | 6.2.5.2 |
| Engine Coolant System | 6.2.6 |
| Engine Instrumentation | 6.2.7 |
| Reagents and Materials | 7 |
| Oil Samples | 8 |
| Preparation of Apparatus | 9 |
| General Engine Assembly Practices | 9.1 |
ASTM D6681-08 history- 2023 ASTM D6681-23 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine—Caterpillar 1P Test Procedure
- 2017 ASTM D6681-17 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine—Caterpillar 1P Test Procedure
- 2016 ASTM D6681-16 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine&x2014;Caterpillar 1P Test Procedure
- 2015 ASTM D6681-15 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine&x2014;Caterpillar 1P Test Procedure
- 2014 ASTM D6681-14 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Enginemdash;Caterpillar 1P Test Procedure
- 2013 ASTM D6681-13 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Enginemdash;Caterpillar 1P Test Procedure
- 2010 ASTM D6681-10a Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure
- 2010 ASTM D6681-10 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure
- 2009 ASTM D6681-09 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure
- 2008 ASTM D6681-08 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure
- 2005 ASTM D6681-05 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure
- 2004 ASTM D6681-04 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure
- 2001 ASTM D6681-01 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine-Caterpillar 1P Test Procedure
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