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Old July 24th 05, 02:08 PM
tim bur
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they are not far off problem is people do not go the 55 mph the calulations
were done at
they still use the old standard of 55mph being the national speed limit and one
i feel we need to go bac to so gas starts to stack up at the refineries and
watch how fast the price comes down

gary wrote:

> I thought the ratings were done on a flat road on the moon where there is
> 1/7th the gravity in order to get those MPG results.
>
> I never thought they were very accurate, I only use them to compare one
> vehicle with another to get a relative ranking when I do a vehicle purchase.
>
> "wraithyjeep" > wrote in message
> ...
> > Actually MPG is determined by unused energy that is left in the emissions
> > it is a chemical analysis with factors of weight and other physics that
> > overall determines the MPG all this is done on a dyno. in a very
> > controlled lab.
> > I used to know the formula (sorry be awhile since I worked in the lab)
> > the only way to truly achieve the listed MPG is with a lot of down hill
> > driving.
> >
> >
> > "General Schvantzkoph" > wrote in message
> > news
> >> When I bought my old Concorde in 94 the MPG ratings were pretty much spot
> >> on, the car got 22 in daily driving and 29 on long highway trips which is
> >> what the window sticker claimed. the MPG ratings for the new 300C is 17
> >> city/25 highway which isn't even close to the real values, I'm getting
> >> 15-16 in daily driving, just did a 220 mile round trip yesterday and it
> >> peaked at 20 MPG. the article on hybrids (quoted in another thread) also
> >> mentions that the real mileage is nowhere near the sticker values. So my
> >> questions are these, has the method for determining the MPG ratings for
> >> cars changed in the last 10 years? Have manufacturer's gotten better at
> >> gaming the system? How do they determine the MPG ratings? It's hard to
> >> see
> >> how Chrysler managed to come up with a 25 MPG highway rating on the 300C
> >> unless they did the test on a road that was down hill all the way.
> >>

> >
> >


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