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Side-Drafting
On the interstate, when being passed by a big rig, if I pull closer to the side of it while it passes, I find that, in its tail draft, my mpg (Scanguage II) goes up by about 5 mpg for a few seconds. I take it I am "side drafting." My question is this: is the turbulence of riding the side lesser or greater for fuel economy than the draft you get at the rear?
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