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A second question I forgot to put in that last post: Will operating windshield wipers add enough drag to reduce MPG? I've read the threads saying that in the "off" position, they're in a "high pressure pocket" where the relative wind doesn't really interact. But when operating, they spend a portion of their time "up" on the windshield. Just wondering how much that's worth? Probably far less than the mirrors being in the "normal" position or "folded back", I imagine. Any thoughts/knowledge?
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