running 87 octane or 89 would have nothing to do with it.. Also the MDS kicking on won't make the truck sputter and such... I've been driving a 2011 for a loaner and that one doesn't sputter when the ECO light is on


I will comment on the CEL and chrysler techs... they seem to be helpless if the light isn't on.. I've been dealing with a CEL issue on my 08 for over 12 months now and the techs seem helpless. They arn't really mechanics just monkeys with wrenches that read a book and follow instructions.

 

also understand that this is only availible in the 5.7 hemi'

 

My 09 sport did the same thing when it was new. Hasn't done it in a while now. The problem is definitely the MDS. Your steady speed is at a point where the engine (computer) can't decide whether or not to be in fuel saver mode. If you change your RPM's slightly, up or down, the sputtering will go away.

The moral of the story is don't sweat it