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the 'w' in the 10w30 is the 'winter grade'

posted by  motorcycletek on  Sat Nov 9 19:41 CST 2002
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last visit: Tue Dec 28 03:39 CST 2010
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A 5w30 flows better in freezing weather than a 20w50 due to the fact that the "5W" qualifies as a 5wt oil at zero(thinner)than a "20W"(thicker)at zero and the 5w30 wt is thinner at 200 degree engine oil temp verses than a 20w50 at the same temp.






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New What does the 10W mean in reference to motor oil?
posted by  C  on Sat Nov 9 16:06 CST 2002 >


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