Author: GoodWinds ★2017 
Date:   2010-12-13 00:14 
 If I ever leave my oboe in the car, which is rare, I cover it with both a blanket and the sun-reflecting thing, mostly to keep temperature at bay.  (I also insulate it while I'm driving between home and concert hall.)  I would not leave it in the car for more than a few minutes if the weather is very cold OR very hot (like the others).  And, just having had other instruments stolen from my car (which has an anti-theft device on it), I don't recommend leaving it, period.   
 
I don't leave it in the trunk, for shock as well as temperature reasons.   
 
I've even had recorders treated with a wax sealant 'melt' on warm days.   
 
I liked the advice of the guy with the dog... or the rifle.  Basically, if you value it, treat it that way. 
 
GoodWinds
  
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