![]() ![]() ![]() Viscosity Index is an important parameter when it comes to lubrication selection. This leads to better thinning resistance and better film strength resistance under hotter conditions, making oils with a high viscosity index more beneficial. Therefore, as the ambient temperature decreases, the viscosity of a high VI oil will increase at a lower rate than that of an oil with a lower VI. An oil with a high VI experiences smaller decreases in viscosity as the temperature at which it is working increases than does an oil with a lower VI. The result of that calculation indicates the temperature/viscosity relationship of that oil. The Viscosity Index (VI) of an oil is calculated from its kinematic viscosity at 40☌ and 100☌. ![]() The speeds and loads of machine bearings generally dictate what base oil viscosity should be used. The base oils choice has to be adaptable and resistant to it’s environment. Base oil viscosity in general is very important. ![]()
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