AC is off during tests. That is why hybrids results are ridiculous. As for
the Hemi, perhaps it was optimized to turn off extra cylinders during the
test and your driving habits do not mirror those test circumstances.


"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.
>