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Message: <blockquote data-quote="mcglsr2" data-source="post: 1337822" data-attributes="member: 15705"><p>It's not apples and oranges, it just apples of slightly different shapes.  The concept, the theory of what is happening is the same, and applicable to both.  The only difference is the degree to which it happens.  But it is still the same effect.  Because the truck is more brick-like, I would expect the reduction in drag due to the tailgate being up to be quite a lot - enough to be measurable by Myth Busters in fact.  On a car, because the shape is a tad more favorable, the reduction in drag might not be as "severe."  But it is still there.</p></blockquote><p></p>