I haven't noticed a big gain in MPG from the wheel skirts, but I have definitely gained in funny looks from other drivers.
People either love it or hate it, but pretty much everybody has something to say about my car one way or the other. The wheel skirts are pretty much the ice-breakers, because everybody I know has commented on them.
Once I explain the gas mileage I'm currently getting with my mods, a lot of haters suddenly fall in love with it.
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