best gas milage will come if your easy on the gas pedal, dont jump off from starts, anticipate stops and coast down instead of racing up and slamming on the breaks. The multiple cylinder MDS works on its own in normal drive. Seems that most cars will use that over 60-65 mph and cruising at a steady speed. On longer freeway trips, cruise control will definately improve your milage too. Dont haul around a bunch of unnecessary junk. I still get good milage on my RT and Im always getting in to it because its so fun.......
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my other toys
1966 Custom Dodge Coronet
88 Corvette Roadster (for sale to help pay for my already ordered Challenger)