I think that means you have a blown head gasket. I am no mechanic though.
It Means there is oil in your water, nothing else......
If there is water in the oil, then the head gasket has failed.
water sinks in water, or rather, oil floats on water, and does not mix
"Butterscotch" oil means water in the oil - cracked head or bad head gasket
A mixture of oil and water is a mixture, not an element. If by substance you mean not a pure substance (element or compound), then oil and water would be a substance (that is a mixture). If you mean oil and water separately, then oil is a mixture of hydrocarbons, and water is a compound (pure substance).
You probably have a bad turbo.
White smoke is usually a sign of water in combustion chamber-check oil for any signs of water in oil
it should not be a water in oil tank it is mean engine cracked
It is at the bottom of the oil pan.
you have water in it, that is bad
You mean like water in motor oil? Easy to find out: just look at it. If it looks like mayonnaise, there's water in it.
Oil and water do not mix; they are immiscible. This is because water is an inorganic solvent while oil is an organic solvent. Therefore, they cannot dissolve in each other.