It Means there is oil in your water, nothing else......
it should not be a water in oil tank it is mean engine cracked
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.
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).
Blown head gasket.
White oil means you have water in your oil.
If excessive could mean you are burning oil or water.
water oil gas
This is water in the oil, usually caused by head gasket failure
If it's in a water-cooled engine, like in a car, then it means you've got water in your oil - a bad thing.
Oil and water will not mix and so will dorm district layers. It is possible to suspend oil in water by splitting it into small particles. This is called a colloid. To find out what it means, it depends on the situation. Could you clarify the question?