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Old 03-05-2012, 11:00 PM   #41
troidus
Beastly Adventurer
 
Joined: Sep 2010
Oddometer: 12,555
Insulating the cabin should improve highway fuel economy in the summer months, since the cabin will eventually cool off and let the compressor cycle. Otherwise, you're trying to refrigerate a big steel box and the A/C will have to stay on full blast just to keep it tolerable inside.
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