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Overview of the oil samples at our disposal. The samples of the wind turbine oil (WTO) and the marine gearbox oil (MGO) are aged in real applications, while the samples of the automotive gearbox oil (AGO) consist of fresh oil artificially contaminated with different concentrations of distilled water.
| Oil Type | Sample Count | Water Content Range (A/cm) | Oxidation Range (A/cm) | AN Range (mgKOH/g) |
|---|---|---|---|---|
| WTO | 46 | 6.19–9.62 | 2.88–7.04 | 0.38–1.14 |
| MGO | 24 | 5.57–7.15 | 3.27–4.82 | 0.12–0.56 |
| AGO | 9 | 8.67–32.7 |
