1. Attachments are working again! Check out this thread for more details and to report any other bugs.

What is mpg at 78-80 mph?

Discussion in 'Gen 2 Prius Main Forum' started by destro23, Apr 6, 2009.

  1. Maciej_S

    Maciej_S New Member

    Joined:
    Sep 1, 2009
    12
    3
    0
    Location:
    Europe
    Vehicle:
    2010 Prius
    Model:
    N/A
     
  2. Manolo1

    Manolo1 New Member

    Joined:
    May 29, 2009
    150
    8
    3
    Location:
    South Florida
    Vehicle:
    2010 Prius
    Model:
    IV
    You are forgetting the .25 Cx of the Prius... it beats the Corolla hands down at any speed.

    Any inefficiencies of the HSD at highway speeds are compensated by the car with the lowest Cx in the world (production).

    I don't know what is the Corolla's Cx, but it has to be over .30 which automatically means a heavy penalty over the Prius.

    I definitely do over 40 mpg at 75-80 and could do better if there is no traffic as I have to accelerate more often that I want to due to tortoises on the left lane...:mad::mad::mad::mad:
     
  3. Aaron Vitolins

    Aaron Vitolins Senior Member

    Joined:
    Feb 28, 2014
    1,612
    1,144
    0
    Location:
    Franklin TN
    Vehicle:
    Other Hybrid
    Model:
    N/A
    I usually try to stay under 75 (set the cruise to 72) but today I thought I pick up the pace (especially since gas prices are down) to 82 mph, for a mile or two, instantaneous was only reading about 27-31 mpg. According to charts the gen 2 should get about 24 mpg at top speed.

    From posts around here say it should be getting high 30s low 40's @ 80 mph .hmm?
    Got ecopias with 42/40 psi.
    Should I be concerned?
     
    HaroldW likes this.
  4. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

    Joined:
    Feb 14, 2010
    6,035
    3,854
    0
    Location:
    Rocky Mountains
    Vehicle:
    2006 Prius
    Model:
    Three
    Instantaneous takes into account temperature, cross-winds, terrain/elevation differences, road surface quality, etc. I get less than 15mpg instantaneous driving up our hill for 2 miles. But on average it all works out.
     
  5. GregP507

    GregP507 Senior Member

    Joined:
    Apr 5, 2014
    3,002
    480
    0
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Less.
     
    Aaron Vitolins likes this.
  6. goldfinger

    goldfinger Active Member

    Joined:
    Mar 12, 2012
    535
    402
    0
    Location:
    Buffalo
    Vehicle:
    2016 Prius
    Model:
    Three
    Life time average in Buffalo NY driving 71 mph is 44 mpg. I slow down a little for ice.
     
  7. Aaron Vitolins

    Aaron Vitolins Senior Member

    Joined:
    Feb 28, 2014
    1,612
    1,144
    0
    Location:
    Franklin TN
    Vehicle:
    Other Hybrid
    Model:
    N/A
    That seems pretty realistic, I feel like my car should get about the same. Sadly cold weather takes down the mpg's. It's in the 20's right now in TN
     
  8. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

    Joined:
    Feb 14, 2010
    6,035
    3,854
    0
    Location:
    Rocky Mountains
    Vehicle:
    2006 Prius
    Model:
    Three
    Lol @ 20 being "cold"
     
  9. GregP507

    GregP507 Senior Member

    Joined:
    Apr 5, 2014
    3,002
    480
    0
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    That's shirt-sleeve weather around here this time of year.
     
  10. Aaron Vitolins

    Aaron Vitolins Senior Member

    Joined:
    Feb 28, 2014
    1,612
    1,144
    0
    Location:
    Franklin TN
    Vehicle:
    Other Hybrid
    Model:
    N/A
    Hey now! I swear it's always felt colder in Tennessee then all the places I've been up north somtimes because we get such humid cold weather here. The weather here is retarded sometimes. One Christmas I was in Colorado walking in the snow with a t-shirt on, it was great! Lol
     
  11. brucebee

    brucebee Junior Member

    Joined:
    Sep 6, 2014
    84
    11
    0
    Location:
    vista, ca
    Vehicle:
    2004 Prius
    Model:
    II
    this isnt scientific but at 79mph on so cal freeways av says 44-46mpgs. speedo off 2mph and i believe display off about 2mpg. cold here in socal this year is mid 40s so far. you guys are tough