Transformer Oil Reclaimation

[bru]

Hi
Does anyone have info regarding comparisons between reclaiming of (older) paraffin based oils vs. Naptha based oils? Are the ratios of Fullers Earth per unit of oil the same for a given lift in IFT?

Also, what about the Neut values, do they change similarly and does anyone have any experience processing paraffin oils, do they foam badly?

Thanks all!