I just assumed it went down because, if like any other human on this rock we call earth, when cold, we leave the car run when we stop in someplace so its still warm when we get out.

I never let it idle in summer.... Just a theory....

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2009 E70 White w/black int
2006 E53 X5 4.8is Sold
2000 SVT Cobra R #193
2003 SVT Mustang convertible