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Specifies a method for measuring the ability to separate from water. Recommended test temperature are 54° and 82° oil, the later being used when the viscosity at 40°C is more than 90 cSt. This method may be unsuitable for high viscosity oils where it is apparent that there is insufficient mixing of oil and water during stirring. When testing synthetic fluids whose densities are greater than that of water, the procedure is unchanged, but it should be noted that the water will probably float on the emulsion or liquid.