* Composition: Blood is primarily made up of water (about 55%), while oil is a non-polar substance that doesn't mix with water.

* Density: Blood is slightly denser than water, while oil is less dense.

* Solubility: Blood carries dissolved substances like salts, sugars, and proteins. Oil is not soluble in water.

* Appearance: Blood is typically red and viscous, similar in appearance to water, while oil is typically clear or yellowish and less viscous.

However, blood also contains fats and lipids which are similar to oil in their chemical makeup. These are essential for cell function and hormone production, but they represent a small fraction of blood's overall composition.

Overall, while blood contains some oily components, its fundamental properties are more similar to water.