well i will tell you when it was on i could feel it change, i don't care what anyone says i can feel it! no offense taken hammer i have it shut off for a reason!

 

Actually, I don't mind MDS. I get 16mpg combined mostly city driving with it. Not bad for a 5500 lb 4X4

 

I can feel mine go on and off but that didn't bother me, just the sound with the Magnaflow cat-back.

 

I went on a 600 mile round trip this last couple of days and my mds would kick in and stay on for a good bit a 80! but man did my truck sound horrible good thing I had radio

 

Same here. I even tried to get a quieter muffler, went from a ar3030 to a larger Magnaflow and I still hate the sound when in 4 cyl mode. Off is fine for me and has very little effect on my gas milage. MDS works great in my 300c but does little for my truck unless I was to drive a whole tank at 55-65. In town and 70mph + it didn't help much if at all.

 

Is there anyway to stop the MDS or do you need a programmer to do so i hate mine i agree with hammerZ71 i paid fer a v8 hemi i want my power all the time its just not the same i am running 35's and can feel it alot more with these on it sucks

 

Turn tow/haul mode on

 

I think you can also just turn overdrive mode off (if you have those capabilities)
I just made a 400km trip and my exhaust came apart at the common point (some of you might know) I could sure tell when my truck kicked into 4cyl. It sounds horrible for any aftermarket exhaust system. It almost sounds like its grasping for more air, or has too much fuel.
As for saving gas mileage it all depends on what you are doing. I average around 19-20 mpg on the highway doing 120km/h. I have quite flat land here, so some days it kicks in all the time. If your in a hilly area its only going to kick in downhills where you don't use much gas anyways.

Now I had a 2010 1500 rental for 2 days, and doing 120km/h I was averaging around 24mpg! I wish i had a camera to take a pic of the console stating it. I think in the older technology hemis with mds its not so good. But the new rams. It actually works, and its visible that it does work.

I also have noticed climate shares a part in when it kicks in. Colder days it doesn't want to kick in as much, but on warmer days with low humidity it almost always goes on.

 

i totally agree with the sound i straight piped my truck and hate when mds kicks in sounds horrible.