Gentlemen and ladies
What an engine has to overcome in acceleration is inertia and drag
(wind resistance, road or rolling friction). To maintain a speed it
only has to match the drag component.  Weight or mass WILL affect
rolling resistance and not surface drag.  There may be an effect on
turbulence and thus drag in the road/underbody space as the space will
be affected by lowering the body on the suspension.

It's all too complicated to calculate so lets just agree that less
weight equals higher mpg all other things being equal. Empty the junk
out of your square rigger. You don't need the ballast.
Cheers all

On Wednesday, August 17, 2005, at 04:31 PM, Automatic digest processor
wrote:

> How much fuel efficiency gained by shedding 300 lbs?