Welcome to PriusChat

We'd love to have you join our community and participate in the conversation! Sign up for FREE today.

Sign Up

ECO Mode...mileage worse!

Discussion in 'Prius c Main Forum' started by donny612, Apr 27, 2012.

Social Buttons

  1. donny612

    donny612 "Captain Jack Sparrow"

    Joined:
    Apr 12, 2012
    Messages:
    117
    Likes Received:
    11
    Location:
    Apex, NC
    Your Vehicle Year:
    2012 Prius c
    Model:
    Two
    I have been driving my C Two in "normal" mode for the last two tankfulls and I've been in the low to mid 50's around town with the occasional inroad into the 60's shown on the dash display. I'm very happy with this...
    I filled up last night and decided to try ECO mode for this tankful to see if my numbers would increase. I realized on my drive home from work (I go home the same way every night) my indicated mileage was considerably lower. Could not get out of the mid 40's. Needless to say, I'm back in "normal" mode. Can someone explain this?? Not making any sense to me. I'm trying to drive as I have been normally...
    Any insight will be appreciated!
  2. prius1driver

    prius1driver New Member

    Joined:
    Apr 6, 2012
    Messages:
    78
    Likes Received:
    5
    Location:
    New York
    Your Vehicle Year:
    2012 Prius c
    Model:
    One
    Sorry I have no "insight" but I did get better mpg driving in ECO mode.
  3. HaveNoCents

    HaveNoCents Conservative Tree Hugger

    Joined:
    Dec 31, 2011
    Messages:
    299
    Likes Received:
    44
    Location:
    Crystal Beach, Texas
    Your Vehicle Year:
    2012 Prius v wagon
    Model:
    Five
    Eco mode only does two things. It changes the pressure on your gas pedal and it helps regulate your heating and a/c.
  4. priusvgator

    priusvgator New Member

    Joined:
    Jan 9, 2012
    Messages:
    47
    Likes Received:
    10
    Location:
    Space Coast, FL
    Your Vehicle Year:
    2012 Prius v wagon
    Model:
    Five
    ECO mode could be causing you to take longer to get to your cruising speed, which in turn is using more gas. Some people have claimed getting their best mileage in PWR mode. I personally do well in Normal. But if I am on the highway, I switch to ECO once I set my cruise control.
  5. Ashley7

    Ashley7 Active Member

    Joined:
    Mar 19, 2012
    Messages:
    527
    Likes Received:
    185
    Location:
    Oregon
    Your Vehicle Year:
    2012 Prius c
    Model:
    Two
    I haven't really noticed a difference between regular and ECO mode, but I don't really drive enough to do a true test. (I've also heard some people do best in PWR mode, but that isn't an option on the c).
  6. F8L

    F8L Protecting Habitat & AG Lands

    Joined:
    Aug 14, 2006
    Messages:
    18,682
    Likes Received:
    3,734
    Location:
    Sacramento, CA.
    Your Vehicle Year:
    2013 Chevy Volt
    Model:
    N/A


    This is what I believe the problem to be. It is just like the other thread were he wrote about getting worse mpg despite trying to take it easy an accelerate so slow he stays in the Eco area. In a lot of cases this is not efficient. It is better to accelerate briskly to your desired speed then lift off the throttle, reapply light throttle to maintain desired speed then glide to the next stop.

    You c guys should spend more time combing through the GenII and GenIII forums. There is a wealth of information in there that applies to the c as well as the v.
  7. kindlewood

    kindlewood New Member

    Joined:
    Apr 12, 2012
    Messages:
    39
    Likes Received:
    4
    Location:
    Cape Cod, MA
    Your Vehicle Year:
    2012 Prius c
    Model:
    Two
    I can't bring myself to take Eco mode off.

    After my first fill up, I drove for exactly 7 miles and got my best recorded mileage so far, at 73.2mpg (I've gotten better, but I kept forgetting to reset the trip mileage, so that it would record it).

    Anyways, I remembered after this short trip that I wanted to try normal mode for a full tank to see if I could get as good mpg as I got in Eco mode. However, driving the same route back, under nearly identical traffic conditions, I could only pull off 65.3mpg...no matter how I drove it, I couldn't get it to go above the mid 60s. I'm positive I would've gotten better had I stayed in Eco mode.

    While I do like the more responsive pickup in normal mode, I couldn't live with the reduced mpg I felt I was getting. I've returned to Eco mode and am happy pulling of the consistent 60+mpg I seem to be getting (driving back roads and avoiding the highway whenever possible).

    This could just be my imagination, but I think I've doomed myself to sticking with Eco mode...as much as I crave a more responsive gas pedal.:(
  8. Brerkev

    Brerkev New Member

    Joined:
    Mar 10, 2012
    Messages:
    35
    Likes Received:
    7
    Location:
    Milwaukee, WI
    Your Vehicle Year:
    2012 Prius c
    Model:
    Four
    Was there any change in recent weather, when you tried ECO mode? Temps took a dip here in WI this last week, and my MPG's reflected it.
    RocMills likes this.
  9. crebble

    crebble Member

    Joined:
    Mar 16, 2012
    Messages:
    176
    Likes Received:
    44
    Location:
    Shohola PA
    Your Vehicle Year:
    Other Non-Hybrid
    Model:
    N/A
    My highway mileage has improved significantly since turning off Eco mode. I find it much easier to modulate my throttle inputs.
    RocMills likes this.
  10. xerox6135

    xerox6135 Junior Member

    Joined:
    Apr 10, 2012
    Messages:
    84
    Likes Received:
    11
    Location:
    michigan
    Your Vehicle Year:
    2013 Prius
    Model:
    Persona
    Oh good I thought it was just me in eco mode I only get 44 to 48 mpg in normal mode I get 51 to 55 tank avg in a mix city and highway driving and yes this was all the route back and forth to work and temp were all in the 50
    RocMills and kindlewood like this.
  11. Genoz World

    Genoz World ZEN-style living

    Joined:
    Feb 21, 2008
    Messages:
    797
    Likes Received:
    17
    Location:
    La Canada
    Your Vehicle Year:
    Other Hybrid
    Model:
    N/A
    Different car, but i'll tell you my discovery, i actually get better mileage when i'm in the POWER mode in my CT200h, which shares the same engine as the regular prius.

    In the economy or ECO mode, the car just LAGS and it takes a huge effort to move from a complete stop. In the power mode, the car zips up to the legal speed limit, I lift the throttle, then put the car in CC until i have to alter the speed.

    This type of driving gets me better mileage than if i left it in economy/ECO mode.

    Good luck, but what works for me might not work for you.

    Lastly, are you using SHELL OIL? I notice that shell works best in my 08 Gen II, same with my CT.
  12. hoddy4

    hoddy4 New Member

    Joined:
    Jun 8, 2009
    Messages:
    120
    Likes Received:
    13
    Location:
    NC
    Your Vehicle Year:
    2012 Prius v wagon
    Model:
    Three
    If you look at some of the discussions on the v, many owners get better mileage in the Power mode.
  13. Kirkuleez

    Kirkuleez New Member

    Joined:
    Mar 13, 2012
    Messages:
    220
    Likes Received:
    19
    Location:
    Oshkosh, Wisconsin
    Your Vehicle Year:
    Other Non-Hybrid
    Model:
    N/A
    When I had my c, I also got better mileage in the normal mode which i was actually happy about because of having quicker acceleration along with better mpg's. Double bonus!
  14. Prius-C1

    Prius-C1 New Member

    Joined:
    Apr 26, 2012
    Messages:
    7
    Likes Received:
    1
    Location:
    Wisconsin
    Your Vehicle Year:
    2012 Prius c
    Model:
    One
    Hate to say like what was mentioned earlier, the C has no PWR mode. Only Eco and normal.
    RocMills likes this.
  15. Mr Incredible

    Mr Incredible Chance favors the prepared mind.

    Joined:
    Jun 23, 2008
    Messages:
    890
    Likes Received:
    452
    Location:
    Neb
    Your Vehicle Year:
    2012 Prius c
    Model:
    Four
    If you drive in eco mode you have change yourself as well. If you want the same accelleration in eco mode as regular mode you'really going to be mashing the gas pedal more and longer. You give up any sort of zippy in eco. You can still get zippy if you need it to get out of trouble, but you have to mash hard.

    Eco is there to enable you to drive as if you had self control.
    RocMills likes this.
  16. UnSurreal

    UnSurreal Junior Member

    Joined:
    Apr 16, 2012
    Messages:
    38
    Likes Received:
    16
    Location:
    Waterloo Ontario
    Your Vehicle Year:
    2012 Prius c
    Model:
    N/A
    Going to try only normal mode this tank and see the difference.
  17. hhyoung

    hhyoung New Member

    Joined:
    Apr 28, 2012
    Messages:
    11
    Likes Received:
    0
    Location:
    San Diego
    Your Vehicle Year:
    2010 Prius
    Model:
    Three
    I didn't realized there was so much montering involved to get the best gas mileage with the Prius. Good insight.
  18. kun1he2

    kun1he2 Junior Member

    Joined:
    Mar 27, 2012
    Messages:
    5
    Likes Received:
    0
    Location:
    Singapore
    Your Vehicle Year:
    2012 Prius c
    Model:
    N/A
    Woah... Didn't even think to try normal mode till reading this thread... :)

    Btw, haven't been following the gen2/3 threads... any quick pointers for optimal driving patterns?
  19. madfast

    madfast New Member

    Joined:
    Mar 22, 2012
    Messages:
    45
    Likes Received:
    26
    Location:
    NY
    Your Vehicle Year:
    2012 Prius c
    Model:
    III
    in my experience, normal mode = for the street, and eco = for the highway. i like the extra responsiveness of normal mode to get up to speed after a red light. and i like the muted response of eco mode for pulse and glide. yes a trained right foot makes either mode unnecessary, but eco mode helps people with a lead foot like me :D
    RocMills likes this.
  20. kkim

    kkim Active Member

    Joined:
    Jan 27, 2007
    Messages:
    381
    Likes Received:
    121
    Location:
    kauai, hawaii
    Your Vehicle Year:
    2012 Prius c
    Model:
    III


Similar Threads: Modemileage worse
Forum Title Date
Fred's House of Pancakes Japan has worse gasoline than we do Sep 4, 2014
Gen III 2010+ Prius Fuel Economy Worse consumption when driving long distances Aug 10, 2014
Prius c Fuel Economy Prius c has worse mpg than Gen III on Fuelly Jul 9, 2014
Gen II Prius Fuel Economy MPG worse after replacing battery, PCV valve, spark plugs, cleaning fuel transmission? Jul 6, 2014
Other Cars Toyota cover-up worse than GM coverup Jun 7, 2014