My Mustang '09 GT convertible, my sixth one since '99, have all averaged
around 22/23 and I have the top down most of the time, except in winter


"Alan B. Mac Farlane" <alanb@sonic.net> wrote in message
news:C50E1502.1378%alanb@sonic.net...
> in article ldJFk.35102$2J7.30145@newsfe02.iad, Mike Y at joe@user.com
> wrote
> on 10/4/08 5:17 AM:
>
>> And really, does it have that much of an effect?
>
>
> yes .. slip streaming the conveyance ... with the top up for example, or
> the
> tail gate down or removed ... helps mileage per se. However with a Boss
> 350
> sucking 4 barrels ... not much room to play with there.
>