11. Report
11.1 Report the mass of the oil separated as a percentage of the total mass of the grease sample. Record the value to the nearest 0.1 %.
12. Precision and Bias
12.1 The precision of the test method is not known to have been obtained in accordance with currently accepted guidelines in Committee D02 Research Report RR: D02-1007.
12.1.1 Repeatability (Note 1) - The difference between two 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 0.1 M in only one case in twenty where:
M 5 mean of two determinations
12.1.2 Reproducibility (Note 1) - 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 0.17 M in only one case in twenty:
M 5 mean of two determinations
NOTE 1 - These values of precision are based on results by 10 laboratories using four greases that varied in consistency from NGLI Grade No. 1 to Grade No. 3.
12.2 Bias - The procedure for measuring the oil separation from lubricating grease has no bias because the value of the oil loss is defined only in terms of a test method.
13. Keywords
13.1 lubricating grease; oil bleed; oil separation