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I thought ECO was only a display to let you know you were driving in the most economical way.
What am I missing here?
 

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The only function of eco mode is telling you when your driving in an 'economical way' as the post above mentioned, nothing more. Turning it off on the EVIC will not disable any function or feature other than that indicator.

I don't think that is true, i think all it does in the EVIC is turn it off on the display. I don't think it disables the actual function.
 

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2015 Overland
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I don't think there's a mode, it just lights up to indicate you are driving at a higher MPG than your average. Admittedly it is annoying to have it go on/off all the time, but it's actually helpful. For instance, if I take the parkway home during rush hour, in heavy traffic, bad MPG right? Wrong, I actually spend more time in ECO range and get better mileage than taking the side streets with traffic, stop signs, hills, and red lights.

Another cool indicator is the bar under average MPG on the Fuel Efficiency screen. The bar will fill/empty based on your current MPG, and there is a little arrow for your average, so even though you can't really watch while you're driving, you can glance and see if you're doing good or not. It is very interesting to see what is actually higher MPG habits or routes versus not.
 

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Really???? Come on no way that eco means that....you guys serious? A little research please ECO is to let you know the MDS is actually doing it's job
MDS (multi displacement system) aka cylinder shutoff!
 

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Really???? Come on no way that eco means that....you guys serious? A little research please ECO is to let you know the MDS is actually doing it's job
MDS (multi displacement system) aka cylinder shutoff!
Actually they are right but you are too. From the owners manual:

"The FUEL SAVER MODE message will display above the
average fuel economy in the EVIC display. This message
will appear whenever the Multi-Displacement System
(MDS) (if equipped) allows the engine to operate on four
cylinders, or if you are driving in a fuel efficient manner.
This feature allows you to monitor when you are driving
in a fuel efficient manner, and it can be used to modify
driving habits in order to increase fuel economy."

If you have a v6 then the MDS obviously doesn't apply so its just telling you that you are driving in a fuel efficient manner. If you have the v8 then it could mean either thing.
 

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Like the person above mentioned, this is only for people with the V8's. If you have a V6, it actually does exactly as some mentioned.

Really???? Come on no way that eco means that....you guys serious? A little research please ECO is to let you know the MDS is actually doing it's job
MDS (multi displacement system) aka cylinder shutoff!
 

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i love it, it's the anti-hippie indicator - it reminds me to keep a heavy foot on the gas :D
 

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i think in my V8, if I select tow, I never see the eco suggesting 8 cylinders at all times?
 

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And tow/haul, on the V8, is limited to 5th gear, does not shift to second overdrive (6 th).
 

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i think in my V8, if I select tow, I never see the eco suggesting 8 cylinders at all times?
And tow/haul, on the V8, is limited to 5th gear, does not shift to second overdrive (6 th).

In essence, what I'm reading is you can simply shut-off "MDS" by selecting and leaving it in "tow/haul" mode? Does it default to "normal" mode after turning off the motor and restarting?

If this is correct, why then would someone want to load a tune to eliminate MDS? Just run it in tow/haul mode all the time....

I've beeen driving my 1991 Cherokee Laredo in tow/haul mode and in 3rd gear since new... it has 170K miles on the original trans and still going strong.



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If you have the V8 engine and the 6 speed transmission, if you shift to 6 then the ECO light no longer appears. Tow/Haul mode will increase your RPMs and hurt your gas mileage especially at high speeds.
 

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I think the "ECO" indicator is kind of laughable in the Hemi considering how bad the MPG average is.
Some of us get very good mileage for a V8...I'm getting above 15 in general driving and about 22 on the highway. (not just measured by the computer, but also by manual calculation) "How" one drives can make a difference. On the highway, shutting down 4 of the cylinders really does help with mileage as compared to older vehicles that don't do that, too.
 
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