Hello, I have a temperature controlled water bath that is capable of controlling the temperature of the water to 0.2 degrees C. However this isn't good enough for my application and I require a greater level of stability. I want to place a metal box filled with oil inside the temperature controlled water bath in order to dampen down the temperature fluctuations that occur in the water. Will this work? My intuition tells me that in order for this to work the specific heat capacity of the oil inside the metal box needs to be greater than the specific heat capacity of the water to have any effect. Another factor I have consider is the viscosity of the oil. Because the oil is more thick than the water I may get areas inside that are hotter than others and because the oil does not circulate as readily as water I may get hot areas. For example the oil near the inside walls of the metal box will be hotter than the oil at the surface of oil as I do not intend to fully submerse the metal box in the water because I am worried that water will leak through the list of the metal box. I need a uniform temperature throughout the oil.