How dos heat affect the viscosity of oil?

i have to do a science project about it, and i am wondering how to conduct this experiment(materials and procedure) i also have to use variables, constants, and controlsHow dos heat affect the viscosity of oil?
Heat can cook and break down oils. With engine oils this ruins the protective, cleaning and other additive properties of the oil.





According to Wikipedia: http://en.wikipedia.org/wiki/Viscosity#V鈥?/a>


';Viscosity is a measure of the resistance of a fluid which is being deformed by either shear stress or extensional stress. In general terms it is the resistance of a liquid to flow, or its ';thickness';. Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction. Thus, water is ';thin';, having a lower viscosity, while vegetable oil is ';thick'; having a higher viscosity. All real fluids (except superfluids) have some resistance to stress, but a fluid which has no resistance to shear stress is known as an ideal fluid or inviscid fluid. For example, a high viscosity magma will create a tall volcano, because it cannot spread fast enough; low viscosity lava will create a shield volcano, which is large and wide. The study of viscosity is known as rheology.';





Check out the temperature based math formula: http://en.wikipedia.org/wiki/Viscosity#E鈥?/a>


';Effect of temperature on the viscosity of a gas


Sutherland's formula can be used to derive the dynamic viscosity of an ideal gas as a function of the temperature.';





For purposes of calculation gases and liquids are assumed to have similar characteristics as with the ';ideal gas.';





Here is a layman's explanation of viscosity: http://www.upmpg.com/tech_articles/motor鈥?/a>





Doing a project on engine oil for school is going to require a heat source (oven) that can exceed that of any household oven into 2,000 degrees so you can actually break down the oil. Yow shouldn't be able to obtain any temperatures like this with an open flame it will take some sort of special ceramic lined oven, like the ones used to make pyrex glass. Or you could expose the oil to the flame of a plasma cutter, but you would probably just vaporize the oil (that flame is too hot). Unless you have access to a brick maker's kiln I would consider another project.





Other projects could be on the type of material and the viscosity of the lubricant used. For many years they have made a model internal combustion engine created out of transparent plastic. You can take one of these models build it and then use a electrical motor to operate the engine. Use a variety of fluids; oil, vegetable oil, water, glycerin and no lubricant. Attach your motor to a variable resistor and a large power source creating a variable power supply. Use Ohm's Law to figure out the power needed by measuring the amperage of the circuit (with an amp meter inside the circuit) measuring the voltage of the circuit and calculating the resistance or measuring it with an ohm meter (most electrical meters can do all three functions). Theoretically the better the lubricant the less energy required to operate the engine. Of course you are ignoring the heat created by the constant explosions in an internal combustion engine, here you are only working with the resistance of the moving parts.How dos heat affect the viscosity of oil?
Look up API Viscosity Charts on the web.