On Wed, 09 Sep 2009 17:33:46 -0500, cavelamb wrote:

I'll go one step farther on this topic...

You want to save fuel?

Slow down!

Isn't that somewhat of a trade-off? I certainly wouldn't expect
to save gas by putting the car in first and just idling at 2MPH
or so to the store and back!

The point being, don't IC engines have a certain range of RPM
where they're most efficient? At what point does wind resistance
come into it?

Thanks,
Rich