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      11-23-2011, 06:18 PM   #8
1speedbike
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Drives: 2008 BMW 135i
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Location: NJ, NYC, Baltimore

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Quote:
Originally Posted by i128 View Post
what's that?
A 60% / 40% mix of methanol and distilled water. It's basically what most windshield washer fluids are anyway. The methanol mixture, though, is primarily for performance.

http://en.wikipedia.org/wiki/Water_injection_(engines)

Personally, I tend to almost never use the sprays.
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