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Number of acceptable (unflagged; highlighted in italics) diagnostic ratios when comparing the weathered to unweathered oil samples by the classic CEN method
| Using 78 classic biomarker ratios | HFO TC | PMRD | ASMB | HB | HFO 6303 | MC |
|---|---|---|---|---|---|---|
| Weathered HFO TC | 38 | 15 | 19 | 11 | 18 | 19 |
| Weathered PMRD | 17 | 40 | 20 | 8 | 15 | 21 |
| Weathered ASMB | 16 | 15 | 42 | 11 | 18 | 22 |
| Weathered HB | 6 | 7 | 10 | 34 | 10 | 14 |
| Weathered HFO 6303 | 17 | 14 | 20 | 14 | 44 | 25 |
| Weathered MC | 15 | 23 | 21 | 11 | 20 | 42 |
