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Old 12-06-2013, 11:24 PM   #26 (permalink)
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Originally Posted by racprops View Post
BUT I had been running them for a couple of years and with so small a improvement calmed could never tell if they or my extra ground effect add ons did ANY good.

I was hoping they would help the van...

Yeah, they only claim a 2% to 4% improvement in fuel economy, not very noticeable on most commuter cars or especially low mpg vans and trucks, but it adds up quick on OTR tractor/trailer rigs running over 100000 miles a year.

If it were my van, I'd run the column straight up from the front edge of that side marker light, about as many as I could fit without spacing them too close together. Of course it isn't mine, so do as you see fit.
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