07-23-2009, 04:51 PM
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#2 (permalink)
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Dartmouth 2010
Join Date: Nov 2007
Location: Hanover, NH
Posts: 6,447
Thanks: 92
Thanked 124 Times in 91 Posts
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I've never heard anyone credibly claiming fuel economy increases from certain brands. Shell does, but I don't consider it credible.
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