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Greenlings: How does weight affect a vehicle's efficiency? 
Autoblog | by Sebastian Blanco | Thu, Oct 29
Autoblog is the #1 Blogger for BMW
Today, one of the main reasons automakers want to reduce weight is because it's a great way to increase MPG numbers. AutoblogGreen reader GenWaylaid sent in a Greenlings question about how, exactly, reducing weight helps efficiency. We investigate his query after the jump.
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