Lubricants, like any other fluids, can wet surfaces. Example: Grease spot on a tablecloth. Spot of water on a clean pane of glass.
Example: Miniature stepping motor gears in automotive instruments
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The oil acts as a noise damping, reducing it by up to 25 dba.
The complete small gear wheel is epilamized by immersion. The oil remains in the gaps between the teeth.
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Stepping motor gears with epilamized and oiled gear wheel. The main purpose of lubrication is to damp noise.
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Noise suppression on a polymer gear wheel with oiled gaps between teeth. Previously epilamized with Antispread E2 / 200 FE 60. Short-profile teeth.
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Drops of water on a lady's mantle leaf. The leaf's surface is "biologically" epilamized! Plants have special wax-like layers for this purpose. However, these only work with water (lotus effect).