ASTM D6795 Standard Test Method for Measuring the Effect on Filterability of Engine Oils After Treatment with Water and Dry Ice and a Short (30 min) Heating Time
13. Report
13.1 Report the following information:
13.1.1 Non-reference or reference oil identification.
13.1.2 Porosity of filter used (25 µm).
13.1.3 Percent change in final flow rate for each test.
13.1.4 Average percent change in final flow rate for the duplicate tests.
13.1.5 For TMC-monitored tests, contact the TMC for reporting requirements.
13.1.6 For tests not monitored by the TMC, an in-house quality assurance sample can be used to evaluate test acceptability.
14. Precision and Bias
14.1 The following criteria should be used for judging the acceptability of 25 µm filter results:
14.1.1 Repeatability - The difference between successive test results, obtained by the same operator with the same apparatus under constant operating conditions on identical test material, would in the long run, in the normal and correct operation of the test method, exceed the following value only in one case in twenty:
Repeatability = 11.4%
14.1.2 Reproducibility - The difference between two single and independent results, obtained by different operators working in different laboratories on identical test material, would in the long run, in the normal and correct operation of the test method, exceed the following value only in one case in twenty:
Reproducibility = 23.6%
14.2 Bias - Since there is no accepted reference material suitable for determining the bias for this test method, bias cannot be determined.
15. Keywords
15.1 engine lubricating oil; filterability; storage
