Cale, If my tonneau helped my gas mileage it had to be in the
+.10ths or 1mpg. I think a hard fiberglass tonneau does help in all
honesty, but not 3 to 5 more mpg.s as I've heard. I would recommend
one over an empty bed tho. Just my .02
GS -
>
> Hey guys - on these tonneaus, tailgates, and MPG numbers.
> The covers do eliminate the 4' tall vertical drop from the rear edge of
> the cab down to the bottom of the truck bed, so we *should* be seeing a
> gain there, but I'm just not getting that on my dak. The drag from the
> truck's (with toneau) comes from:
> a-relatively big frontal area
> b-lots of air going under the truck and mixing with the mechanicals
> c-vertical drop behind cab to top of tonneau
> d-vertical drop from top of tailgate to bottom of bumper.
>
> Agree, disagree, impartial? any aerodynamicists out there?
> Later,
> Cale
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