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Are these formulated lubricants, or just base oils being dumped on the plate? I have seen this pic before, and the POA lube suprised me.
I assume base ois with no additives, but the next questions are:
1. Are those base oils of the same viscosity?
2. It looks like these oils are in a test tube, and not on a hot plate?
Optimized additives mean you tinker with the additive package until you find the best formulation combined with the base oil.
Generally speaking, and if you have a large budget, you work with the additive company to get an additive mix that plays well (tests well) with your base oil mix.
I prefer to make my own additive package to optimize the oil.