The W actually stands for "winter" but basically means "viscosity when cold." So 10W-40
oil acts like SAE 10
oil when it's cold, but acts like SAE 40
oil when it's hot.
0W-
20 oil acts like SAE 0
oil when it's cold, but acts like SAE
20 oil when it's hot. Motor
oil.Jun 28, 2015
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