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When to NOT use ECO Mode

5K views 16 replies 8 participants last post by  Specx 
#1 ·
I have a 2014 JGC Limited 4x4 and I am just curious if there are times I should NOT have ECO Mode on in order to give me better MPG?
 
#3 ·
since I put my exhaust on recently and I hated hearing the MDS kick on, so I figured I would shut it off. I did and I love the way the jeep drives with the eco off in comparison to it on. the motor just feels like its running smoother. and with it off, I haven't noticed much of a drop off in my MPG.

for how much better the truck sounds, feels and reacts with eco off, im going to keep it off. It out ways the MPG loss.
 
#5 · (Edited)
Off most of the time. The exception is driving on the highway at 55mph or higher. My experience was the same as some others, once I hit around 5000 miles I started getting a ruhmbling noise in what had been a very quiet car. The dealer confirmed that it was in fact the MDS kicking in. They are set to kick in at speeds in the low 20's. In spite of the 8speed, you just can't properly push a 5000 pound vehicle on 4 cylinders.

With Eco off the Jeep is quiet and responsive. I don't pay much attention to mileage, so I have no idea what impact this has, and I don't gara. My Jeep performs, quietly. :)


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#4 ·
i would think it depends on where and how you drive. Im pretty sure my wife does better with it off. But we are on long island, with a million stops to get anywhere, and all the mom doing the 0-40 mph drag race from light to light. She gives it gas, annoyed it didn't do what she wanted, gives it more, downshifts, and now revs up higher than it would have.
 
#6 ·
Is that what that is Bill? I've noticed a slight rumble at low speeds which seemed to always go away when a little extra push on the accelerator, but didn't put together it was the MDS kicking in.
 
#7 ·
Is that what that is Bill? I've noticed a slight rumble at low speeds which seemed to always go away when a little extra push on the accelerator, but didn't put together it was the MDS kicking in.
The evidence, and other members seem to confirm this. Your description is right on. The tech told me that one of the Dodge products had it set so low that customer complaints forced them to raise it, but not enough.

Did you always have it, or did it start after you had some miles on your Jeep?


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