> Are there some GM models that do this?
>
> My new Chev Uplander Van will show average, until I reset it manually,
> but it does not show what it is as it changes every second or two,
> like my old 1990 Jaguar does, for example.
>
> If this were displayed by default on every vehicle made it would
> probably encourage many drivers to stay away from rapid starts away
> from stops, and to not speed right up to stop lights and jump on the
> brakes as many do now. This would not only create a driving culture
> of economy, but result in a much safer driving environment for all of > us.
>
My LeSabre has the Instant MPG. It does give you an good idea of the mpg at different speeds. I checked mine on the same stretch of highway at 70, 65,
60, but at 55 I feared for my life as other cars passed me. There was a 4 mph difference, but I still drive at 70. I hate going slow on an Interstate with light traffic. The expense of getting speeding tickets is the only thing that keeps me from going 80 or 90.