At 60 mph on a level road with no headwind my 99 R/T gets about 19mpg, but at 70
it drops to 16. I believe it has to do with wind resistance.
Jim wrote:
> I once read an article about safe driving speeds, and in it they said
> that it takes much more power to get your truck movin at 70+ then it would
> to keep it at 55-60. much more as in +50% or somthing like that, just to
> maintain the speed increase, due to some mass/speed ratio...you must forgive
> me I am not a math major :) so that must mess up gas mileage also.
>
> anyhow I am new to this list, my name is Jim and I live in the Akron area,
> my truck is a white dakota sport 99...v6 all stock right now. Hopefully
> that will soon change, especially after reading on how easy it is do some
> some mods. (I am not a mechanic either)
>
> > I have continually found that , and I presume this is due to the gearing
> > ,that if you keep the truck at 60 MPH on the hiway , for a real long trip
> ,
> > without using the AC , you *can* see 20 MPG .
> >
> > At 60 MPH the truck turns right at 2000 RPM in overdrive , as soon as you
> > get over 2000 RPM , the MPG drops exponentially .
> >
> > I usually see around 13-13.5 in town if I take it easy .
> >
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