Quote:
Originally Posted by jst2878
whats the difference for the engine when using 0w-40 instead of bmw synthetic(ibelieve5w-30). is it thicker,thinner,please enlighten me.
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Thinner when cold, thicker when hot.
The thin end of the scale (0) means that there is less protection from the oil on startup, but that the oil can be pumped easier. The high end of the scale (40) means the oil can better stand up to high speed runs across the desert, for example.
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2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
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2002 325xi 5 MT, Steel Grey
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06-09-2010, 12:26 PM
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