What is the state of lubricating oil (motor oil) when it seeps?

When lubricating oil seeps, it often indicates that the oil has become emulsified. Emulsification occurs when the oil mixes with water or other contaminants, resulting in a mixture that reduces the oil's essential properties. This condition can lead to the breakdown of the oil's lubrication capabilities, causing it to lose its effectiveness and potentially damaging engine parts.

In contrast, viscous oil refers to its resistance to flow, which may not directly relate to the problem of seeping. Aerated oil contains air bubbles, which can affect its performance but isn't specifically linked to the seepage issue. Thickened oil indicates an increased viscosity due to oxidation or contamination over time but does not capture the essence of what occurs when oil seeps. The state of being emulsified provides a clearer understanding of why the oil is no longer functioning effectively and is prone to leaking from its intended position.