I tried some brands of fuel cleaners and it did not seem to help much if any. So I just went to the dealership and paid them to have my injectors thouroughly cleaned. $99 bucks and it's a done deal. After I got it back, I can definitely feel that more power is there and my mileage has improved to nominal mpgs rated for my R/T. One thing is certain, my cold engine idling is much much smoother now. I problably won't go back for another cleaning at least for another 20k-30k miles as long as I am using good reputable fuel and keep scheduled maintenance.

 

Sorry it took a while to get this but the gear ratio according to the glove box info is 3:55. Hope that helps.

 

At times, I wished I had a lower gear ratio just for MPG's sake. I am running 3.92 gears plus a 5.9 engine plus full time AWD so good mileage just does not exist for this R/T. But I did get a slight improvement on mpg's by replacing the stock paper air filter with a K&N replacement. I am avg 11-12 in town and 13-14 on the highway. And that's being easy on the pedal in town and avg around 70 mph on the highway.