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      03-29-2011, 02:25 PM   #38
Whoopsy
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Drives: 11 B7, 11 X6M, 07 997TT, 08 X5
Join Date: Jun 2007
Location: Vancouver,BC

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Quote:
Originally Posted by gilbertfg View Post
Let me throw my 2 cents out here! W stands for WINTER, not weight. Oil is measured with viscosity. So for those of you using the wrong thicker oil, think this way if you force a thicker oil through smaller passage you're damaging the seals. Viscosity rating has something to do with WINTER due to oil freezing. Let me double check with my Army books lol....
Yes, w in 5w-30 stands for winter, as the first number with the w is the viscosity rating when cold and the second number is when hot.

But since most people uses weight when referring different viscosity oil rating, the term weight stuck.
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