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Old 06-13-2009, 08:52 AM   #11
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Originally Posted by evoracer306 View Post
I drive a 2005 Silverado and I was wondering what effect the mirrors have. For the last tank I ran I folded in the right side mirror. I saw slightly better than a half MPG increase when I filled up and that was even using the A/C on one hot day.

I have no idea. a truck like that isn't gonna notice much from small aero changes. (such terrible aero to start with and a big engine to ignore it, even the v6) 1/2 mpg variation in one tank is well below most peoples standard deviation.

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Old 06-13-2009, 09:05 AM   #12
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1/2mpg when you're starting so low is actually a pretty chunky gain, and I doubt merely folding a mirror in would cause that.

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