Quote:
Originally Posted by oil pan 4
The biggest aero hit I remember seeing was when someone on here had a suburban like mine and removed a big ugly home made roof rack and picked up something like 1.5mpg which turned out to be slightly less than a 10% improvement. Which was not bad.
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Our 2006 Grand Caravan has the roof rack with removable crossbars and the only difference I ever saw w/o them was about 1mpg when running empty on my commute (27mpg vs 26mpg)....and that was likely wishful as that is within the usual variance. When we get the car running again, I will do an a-b-a type test, but mostly for a grille block. ;-)