Varying the oscillation parameters when using coarse magnesium turnings leads to a similar result as when using the finer magnesium turnings. A slight negative dependency of the selectivity on the oscillatory Reynolds number was observed (figure ). The results scatter more compared to using fine turnings. Interestingly, for some data points selectivities above the value of an oscillation-free flow were recorded (Re0 = 0). The data suggests that some positive effect of the oscillating flow might occur when using the coarser magnesium turnings. A separate analysis of the influence of the oscillating frequency and the amplitude does not yield a clear picture. The selectivity dependency on the frequency scatters strongly around a selectivity of about 75% (figure ). It is concluded that the stroke frequency has no influence on the selectivity for a bed of coarse magnesium turnings, at least in the applied frequency range. The influence of the amplitude is not much clearer. At the highest amplitude, a negative impact on the selectivity can be observed. For the remaining data points scattering is too strong to draw a final conclusion (figure ). The significant scattering of the data points leads to the conclusion that the partial positive effect on selectivity is not a result of the oscillating flow, but more likely be related to less uniform and less reproducible magnesium beds due to the broader particle size distribution and larger magnesium turnings. The characteristics of the magnesium bed seem to dominate when coarse magnesium turnings are used.