So, Do YOU drive with Eco ON? or Eco OFF? - Page 3 - Hyundai Forums : Hyundai Forum
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#21 Old 06-25-2012, 02:48 PM
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Originally Posted by rjacobs View Post
I just did the second half of a long drive(Houston, TX to St. Louis).

On the way down a month ago I drove with the eco off. Average speed of 70mph(per the trip computer). Usual real speed was 75mph with lots of slower areas hence leading to the 70mph average. Got 34.5mpg on the trip computer(I think it was like ~32 calculated).

On the way back yesterday I drove the whole way with ECO mode on. I did 70 actual for about 4 hours between Houston and Dallas and was seeing 37.3mpg on the computer. North of Dallas all the way to St. Louis I was doing 75mph(again with some parts going through towns where you have to slow down) and average speed was again right at 70mph on the trip computer. I got 36.3 on the computer.

So roughly a 2mpg gain(per the trip computer) on the exact same route doing the exact same speed. You could call it maybe 1.5mpg difference to take some errors in my driving style out of the equation. So in one tank of gas that would be about 28-36 miles more. So IMO not that great of a change, but on a long trip I will for sure be using ECO mode again.
But I wonder what it really does at highway cruising speeds if all it really does is temper throttle at acceleration?
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#22 Old 06-25-2012, 03:35 PM
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But I wonder what it really does at highway cruising speeds if all it really does is temper throttle at acceleration?
probably not much if anything at all.

I was just posting my results driving basically the same route at the same speeds one way using eco and one way not using it. So for around 1-1.5mpg difference, eh, doesnt mean much to me honestly. If it gave 5, that is a fairly good change, but 1-1.5, meh.

It did accelerate slower coming out of the speed zones that passed through the various cities coming up 69 from DFW to Big Cabin, OK than it did going down. I did all the driving and accelerating/deceleration on the cruise control for the most part unless I hit a stop light.
#23 Old 06-25-2012, 03:55 PM
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Originally Posted by 11SonataScott View Post
Mine is like yours. It's merely a light that comes on when an algorithm says we're driving economicly. It will go off when stopped, going over about 77 mph, stepping on the gas more than lightly, or putting it in manual mode. Probably more ways too.
yea thats all it says in the owners manual. "a light that saying when you are driving eco" lol bunch of bs
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#24 Old 06-25-2012, 08:16 PM
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off 90% of the time. on when i'm on the highway driving a long stretch and remember to turn it on. lmao

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#25 Old 06-25-2012, 09:00 PM
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On always. I have tried it off for a few days and it does have better response but in most driving situations you will barely notice it unless you haul a$* all the time. The 1.5MPG saving is pretty much what you get for having it on. I get about 24-25 right on my Turbo in city driving which is what my 2011 Elantra was getting.

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#26 Old 06-25-2012, 09:01 PM
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off 90% of the time. on when i'm on the highway driving a long stretch and remember to turn it on. lmao
Do you think it achieves any real efficiency on the highway?
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#27 Old 06-25-2012, 09:56 PM
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I think it is efficient. U guys might not notice coz u dont have the blow off valve open, but when Im in ECO the bov blows soft & with no ECO its really loud. I honestly think it lowers ur boost & takes off more calmly.

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#28 Old 06-25-2012, 10:21 PM
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Every time you turn it off, God kills a dolphin. True story.

Mine is always off, but it is an early Sonata, so it is only an indication light and changes nothing.
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#29 Old 06-25-2012, 10:47 PM
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Originally Posted by Mikemu View Post
Do you think it achieves any real efficiency on the highway?
i couldnt tell you. some say it does, some say it doesnt. i mean, if theres a button that supposedly helps us gas mileage (really meant for highway driving) then im gonna turn that bad boy on. lmao

my daily route isn't always the same so i dont have the luxury to test this out. if anyone is willing to test this out and drive the same route one way with ECO ON and the other with ECO OFF, and post the results I think everyone could benefit. Please use the same speed with cruise control, however.

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#30 Old 06-25-2012, 10:53 PM
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Originally Posted by PlatinumRespect View Post
if anyone is willing to test this out and drive the same route one way with ECO ON and the other with ECO OFF, and post the results I think everyone could benefit. Please use the same speed with cruise control, however.


I posted this earlier. Read a few posts up and you will see my results. While far from scientific it does show a slight MPG improvement.
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