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What oil specification is used to express the thickness (viscosity) of the oil?​
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What oil specification is used to express the thickness (viscosity) of the oil?​

User Zenocon
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Viscosity is notated using the common classification “XW-XX”. The number preceding the “W” (winter) rates the oil's flow (viscosity) at zero degrees Fahrenheit (-17.8 degrees Celsius). The lower the number, the less the oil thickens in cold weather.

User Mjoppich
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