'16 real MPG

Discussion in 'Gen 4 Prius Fuel Economy' started by DieselHybrid, Dec 31, 2015.

  1. bisco

    bisco cookie crumbler

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    hycam is optimistic too. funny that some reviewers of gen 4 got same at pump as mfd.
     
  2. cjecpa

    cjecpa Member

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    Found this on mileage

     
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  3. mozdzen

    mozdzen Active Member

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    Typical for a Gen III, guess also for a Gen IV
     
  4. mozdzen

    mozdzen Active Member

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    If you change the diameter of the tire, your odometer will be off. I use mile marker signs on the highway - count 10 of them for 10 miles and see how much your odo has advanced.
     
  5. mozdzen

    mozdzen Active Member

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    Downhill can do wonders for the mpg.
     
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  6. krmcg

    krmcg Lowered Blizzard Pearl Beauty

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    That 90 degree temperature in the dead of winter sure helps...
     
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  7. fsu23phd

    fsu23phd Member

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    I've hit 70 MPG a few times. I'm not that gentle of a driver, but it does great in traffic.

    :) This is going to sound like a stupid question, but I don't know what those acceleration lines mean on the heads up display. There are two of them, blue and green. What do they mean?

    I also find that the I prefer to watch the MPG histogram which on the touch screen display, under car to see my current MPG. That influences my driving style more than the HUD. :)
     
  8. altdel

    altdel Member

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    Reached the 500 mile mark this morning. MFD reads 61.7 mpg. Going to work always gets better mpg than returning home. I would see mid 70's in the morning (more downhill slopes) and low 60's in the evening (more stop-and-go traffic).

    Compared to my Gen2 Prius (2006), which I drove for 10 years and got about 50 mpg, the percentage improvement is around 20%! Not bad.

    IMG_20160219_074321.jpg
     
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  9. krmcg

    krmcg Lowered Blizzard Pearl Beauty

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    My improvement from Gen 2 to Gen 4 is also about 20%!
     
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  10. Mendel Leisk

    Mendel Leisk Underfoot

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    I'm starting to really hate you guys. :ROFLMAO:
     
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  11. bwilson4web

    bwilson4web BMW i3 and Model 3

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    The smaller 'green line' appears to track with the earlier power line in the Gen-3. But the blue 'whish' has me wondering. Perhaps there is something in the Owner's Manual?

    I'll check the New Car Features.

    Bob Wilson
     
  12. krmcg

    krmcg Lowered Blizzard Pearl Beauty

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    third fillup 1.jpg third fillup 2.jpg Bought Gas Again!

    First fill-up data:
    1/22/16 - 650 miles
    10.211 gallons (first click)
    63.66 calculated MPG
    64.9 MFD MPG – <1.9%> Delta

    Second fill-up data:
    2/5/16 - 675 miles - odometer 1275
    10.605 gallons (first click)
    63.65 calculated MPG
    67.9 MFD MPG – <6.3%> Delta

    Third fill-up data:
    2/19/16 - 725 miles - odometer 2050
    10.571 gallons (first click)
    68.58 calculated MPG
    72.4 MFD MPG – <5.3%> Delta

    All-up data:
    2/19/16 – 2050 miles on odometer
    31.387 gallons (all first click)
    65.31 calculated MPG
    68.54 MFD MPG – <4.6%> Delta
     
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  13. Tideland Prius

    Tideland Prius Moderator of the North
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    Huh, so the MFD is overstating mpg again? Still fantastic mileage though!
     
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  14. gerbre

    gerbre Junior Member

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    Your first fuelly entry has no mpg number. Maybe you could add a start entry without numbers like user Earl T Gray for his Prius 4. Then your first fuel-up would be the second entry with mpg number.
     
  15. Trollbait

    Trollbait It's a D&D thing

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    If he is using the odometer reading, there won't be any calculation for it done. It is the start point for Fuelly to calculate all the following entries. In other words, it tells Fuelly to use odometer reading X for calculating all future traveled distance, since this is the point that it is known that the tank was full.
     
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  16. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Good question and the easy answer is the 2016 Prius does not need additional instrumentation:
    [​IMG]
    • The green line, total vehicle power, has fallen below the "EV" band as it regenerates and puts a charge into the traction battery. Notice in this case, the 'blue swish' is off because the accelerator is off.
    [​IMG]
    • The green line, total vehicle power, is in the EV mode, power range that the traction battery could power the car. The 'blue swish' is fairly depressed but the car is only responding, at this time, with power in the EV mode range, ~10 kW.
    [​IMG]
    • Here the green line, total vehicle power, is higher than the range the traction battery can provide, ~10 kW. The blue swish has not really changed that much but this is OK. As long as the total vehicle bar is in the ECO range, even with the engine running, the car is in a sweet-spot for total efficiency. The excess engine power will charge the battery and the total energy efficiency is good.
    [​IMG]
    • The video had only a few frames where the green line, total vehicle power, had gone into "PWR" mode. This begins to put the car into less efficient modes and should be avoided for high mileage. In the video, it happened very early and once that fuel penalty is paid, there is no refund. Notice the accelerator "blue swish" is pretty well maxed out.

    Bob Wilson
     
  17. gerbre

    gerbre Junior Member

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    The blue line is a guidance line. To save fuel your green line should stay inside the blue. To quote the manual:

    "ECO Accelerator Guidance”

    A blue zone is displayed in the Eco area which can be used as a reference operation range for using the accelerator pedal according to driving conditions such as starting off and cruis- ing.

    The “ECO Accelerator Guid- ance” display changes accord- ing to the driving status, such as when starting off or cruising.

    It is easier to drive in an Eco-friendly manner by driving according to the display showing the accelerator pedal operations and staying within the “ECO Accelerator Guidance” range. (P. 209)

    The “ECO Accelerator Guidance” function can be turned off in the “Meter Customize” settings. (P. 142)
     
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  18. vince22

    vince22 Active Member

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    more than 20% for me, my other are SUV's, now that i have reached 1000 miles driving Eco mode, I'm going to try normal and power mode today , do you think there will a significant drop in mpg?
     
    #98 vince22, Feb 21, 2016
    Last edited: Feb 21, 2016
  19. Trollbait

    Trollbait It's a D&D thing

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    You should only see a drop if you ignore the Eco guidance display; hit Wheee! pedal. Or if the motor control of your right foot is too imprecise for the touchier pedal response.
     
  20. Blizzard_Persona

    Blizzard_Persona Senior Member

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    The way I look at it is, eco mode is a constant reminder to drive conservatively. With the firmer pedal feel and sluggish acceleration sense.

    Normal mode and power mode probably will result in some mpg loss due to the reverse of above as well as the fact that it feels more like a "normal" car which makes most folks drive differently or more aggressively.
     
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