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BMW 3-Series (E90 E92) Forum
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Exhaust vapour on idle
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| 01-20-2016, 12:52 AM | #23 |
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Major General
 
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Rep 5,050
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Over 10% of your exhaust gas is actually water, when the weather is cold you can see it, just as you can see the water content of your breath as you breathe out, but when the weather is warm you can't see it!
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