My wife's '06 Charger R/T with MDS has just a tick over 15,000 miles on it.
Over five trips between Upstate NY and Va (and back - 975 miles R T), and one between Niagara Falls and back (750 miles R T) we've "averaged"
25.4 mpg "highway".
Obviously, she doesn't drive very far to work (10 miles/day R T), and averages
16.1 mpg "around town".
The 5.7L highway mileage is actually better than my '01 PT Cruiser (which just rolled 50,000 miles a few weeks back) by 3 mpg.
These figures, BTW, are via the onboard system (which I believe runs off of the transmission). We have the tire pressures up to the max recommended pressure, so I believe the "actual mpg" (if I were to calculate it manually) would be even higher (by about 3 - 5%).
I'm actually
thinking of getting the Challenger with the 5.7L HEMI
instead of the SRT8 6.1L HEMI partly because of the MDS, and partly because I'd like to get a "Predator" and flash both of the Dodge's with one chip (instead of buying two for two engines / programs).
I was also thinking about going with a Supercharger system on the Challenger/5.7L and having something unique. For the $6K cost of the supercharger, I'd be saving much more than that on the difference between the cost of the trim levels and eliminating the "gas guzzler tax", and
still end up having more HP. I'm sure the supercharger would negate any benefit the MDS could bring, but I love the sound of a "pressure cooker" whistling under the hood.
BTW:....JJMPB...
The PT Cruiser isn't scheduled for the production axe until m y 2009 - due in large part to "re-design limitations" (according to rhumors I've heard / read). The PT Cruiser "convertible"
IS scheduled to end production
this year due to poor sales figures.