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      11-12-2011, 03:33 AM   #4
Second Lieutenant
Drives: 2011 e90 M3
Join Date: Jul 2011
Location: TX

Posts: 265
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Tires don't like it either. Isn't -40 the "magic" temp for different type of oil? It sticks in my head for some reason. But yep, colder air is always more dense. It's usually drier in the winter too, which is also denser than humid air.
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