Emulsion of Water in Motor Oil

Most recent answer: 09/20/2020

Could someone please verify for me that type IV deionized water made from distilled water will mix with motor oil and not separate? I observed this when I was young man. We used deionized water to rinse cars off. One day my boss put the hose of deionized water into a 5 gallon bucket half full of motor oil. the mixture immediately turned chocolate milky colored and remained that way for days.
Las Vegas

The lack of ions in the water would play a small role. I suspect that milky suspension was stable because of some detergent (molecules with hydrophilic and hydrophobic parts) in the oil. A layer of those mollecules on the surface of a water droplet can stabilize it. 

But you could try the experiment yourself. Only a small amount of oil would be needed, so as not to waste it and make more polution.

Mike W.

(published on 09/20/2020)