"Tiny Cooling Fan" We all know it's bearing and a few other parts are needed to lubrication oil. Oil, lubricating oil is our common, but, also took part in this oil grade. High, medium and low grades of oil. Low-grade oil, it is relatively thin, pour out like water may be just a little yellow color, but also volatile. "Tiny Cooling Fan" of high-grade oil viscosity is better, not easily air to evaporate. Making it a longer life. Jia Duojia less oil cooling fan is a fan of the quality of a relationship. Oil adds a, "Tiny Cooling Fan" in the operation, it is possible to put the oil thrown out. Oil less of it, it will make the life of the fan will not reach 2W hours.