So... I drove home from work this afternoon in 5th (no eco) and noticed my gas mileage improve quite substantially! Instead of getting between 15.6 and 16.5 litres per 100Km, I shot down to 12.1 litres per 100Km (or around 20 mpg)!
I even shifted down to 4 but didn't feel comfortable in that gear. Though I never noticed an RPM drop between 5 and 4.
As for getting 12 litres per 100Km, I used to get that when my truck was new, and I was doing highway driving (but not in 5 on EVIC).
I'm a believer!
Cool! I think dodge should have made MDS only enabled above a certain speed....like say 55mph or so.