800 mile per tank challenge

Discussion in 'Gen 4 Prius Fuel Economy' started by cproaudio, Jan 28, 2016.

  1. cproaudio

    cproaudio Speedlock Overrider

    Joined:
    Jul 7, 2010
    2,401
    756
    0
    Location:
    CA
    Vehicle:
    2010 Prius
    Model:
    V
    OK So Cal is getting warm. I'll have to start using my AC soon.
     
  2. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    496
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    All trips were in temps between 50F and 80F. Wilmington to Raleigh was in moderate to heavy rain.

    Thur 3/10 – 141.9 Miles, Raleigh, NC to Fayetteville, NC Round Trip, end of last tank, first 10 miles on this tank.

    Sat 3/12 - 64.2 Miles, Visit friend on other side of Raleigh, Groceries

    Sun 3/13 – 26.0 Miles, Home Depot, Bowling

    Tue 3/15 – 39.3 Miles, Dinner

    Thur 3/17 – 31.3 Miles, Doctor’s Appt

    Fri 3/18 – 124.6 Miles, Raleigh, NC to Fayetteville, NC Round Trip

    Wed 3/23 – 30.8 Miles, Dinner

    Thur 3/24 – 164.0, Raleigh, NC to Fayetteville, NC to Myrtle Beach, SC

    Sun 3/27 – 188.4, Myrtle Beach, SC to Wilmington, NC to Raleigh, NC

    Tue 3/28 – 37.2 Miles, Dinner, errands

    Thur 3/31 – 125.3 Miles, Raleigh, NC to Fayetteville, NC Round Trip

    Fri 4/1 – 82.8 Miles, Dinner, Visit friend in Coats, NC.

    Sun 4/3 – 38.5 Miles, Walmart, Bowling

    Mon 4/4 – 38.7 Driving around town until Trip A shows 1000 miles.
     

    Attached Files:

    #42 krousdb, Apr 5, 2016
    Last edited: Apr 5, 2016
    iplug, Sergiospl and GaryD1 like this.
  3. thunderstruck

    thunderstruck Active Member

    Joined:
    Feb 22, 2016
    154
    150
    1
    Location:
    Port Charlotte, FL
    Vehicle:
    2022 Prius
    Model:
    Three
    How accurate is your odometer-is it under reporting miles traveled,meaning you actually had more than a thousand miles on the tank?
     
  4. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    496
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    It under reports by 1.9%. My fuelly info corrects for that. it was about 1020 miles actual.
     
    bwilson4web likes this.
  5. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    25,816
    14,605
    0
    Location:
    Huntsville AL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Average speed on each trip?

    date miles total miles MPG mph activity
    1 03/10 141.9 141.9 91.6 ~32 Raleigh; NC to Fayetteville; NC Round Trip; end of last tank; first 10 miles on this tank.
    2 03/12 64.2 206.1 91.1 ~32 Visit friend on other side of Raleigh; Groceries
    3 03/13 26.0 232.1 91.1 ~32 Home Depot; Bowling
    4 03/15 39.3 271.4 93.6 ~32 Dinner
    5 03/17 31.3 302.7 91.2 ~32 Doctor’s Appt
    6 03/18 124.6 427.3 89.7 ~32 Raleigh; NC to Fayetteville; NC Round Trip
    7 03/23 30.8 458.1 85.9 ~32 Dinner
    8 03/24 164.0 622.1 ? ~32 Raleigh; NC to Fayetteville; NC to Myrtle Beach; SC
    9 03/27 188.4 810.5 ? ~32 Myrtle Beach; SC to Wilmington; NC to Raleigh; NC
    10 03/29 37.2 847.7 91.2 ~32 Dinner; errands
    11 03/31 125.3 973.0 91.4 ~32 Raleigh; NC to Fayetteville; NC Round Trip
    12 04/01 82.8 1055.8 87.7 ~32 Dinner; Visit friend in Coats; NC.
    13 04/03 38.5 1094.3 87.8 ~32 Walmart; Bowling
    14 04/04 38.7 1133.0 89.7 ~32 Driving around town until Trip A shows 1000 miles.

    Table tags are not easy. Feel free to reply to this note and take out the "QUOTE" tags. @krousdb thanks for the speed info. This helps validate the roll-down coefficient table and graphs:
    • "," is a column separator so substituted ";"
    • did not find photos for 03/24 and 03/27 for MPG
    I do not understand why the ending miles does not equal 1000.7 in "TRIP A". The error is less bad if the first log record was not recorded. Then if the "0" entries (i.e., April 2) actually had unrecorded distances that showed up in "TRIP A", it would make sense. Any thoughts about the "0" entries?

    This is a new model and I would not be surprised by finding some 'infantile' problems.

    Thanks,
    Bob Wilson
     
    #45 bwilson4web, Apr 5, 2016
    Last edited: Apr 5, 2016
  6. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    496
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    Top speed is 45 MPH. I use cruise control as much as possible. All driving is on secondary roads, mostly straight and flat (easy passing for faster drivers), 25 MPH min, 55 MPH max. The Raleigh to Fayetteville RT ranges between 35 and 37 MPH average depending on stop lights. Trips around town are closer to 20-25 MPH due to stop lights and stop signs. The tank average was 32 MPH.

    Updated post to add the missing file for 3/24 and 3/27. Note that the 3/10 numbers had the first approx 10 miles on this tank. The rest was from a previous tank. Add 3/12 thru 4/4 plus that ~ 10 miles and you will get 1000.7 miles total.
     
    #46 krousdb, Apr 5, 2016
    Last edited by a moderator: Apr 9, 2016
    iplug, telmo744, GaryD1 and 1 other person like this.
  7. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    25,816
    14,605
    0
    Location:
    Huntsville AL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Perfect!
    date miles total miles MPG mph activity
    1 03/10 9.6 9.6 91.6 ~32 Raleigh; NC to Fayetteville; NC Round Trip; end of last tank; first 10 miles on this tank.
    2 03/12 64.2 73.8 91.1 ~32 Visit friend on other side of Raleigh; Groceries
    3 03/13 26.0 99.8 91.1 ~32 Home Depot; Bowling
    4 03/15 39.3 139.1 93.6 ~32 Dinner
    5 03/17 31.3 170.4 91.2 ~32 Doctor’s Appt
    6 03/18 124.6 295.0 89.7 ~32 Raleigh; NC to Fayetteville; NC Round Trip
    7 03/23 30.8 325.8 85.9 ~32 Dinner
    8 03/24 164.0 489.8 80.0 ~32 Raleigh; NC to Fayetteville; NC to Myrtle Beach; SC
    9 03/27 188.4 678.2 80.3 ~32 Myrtle Beach; SC to Wilmington; NC to Raleigh; NC
    10 03/29 37.2 715.4 91.2 ~32 Dinner; errands
    11 03/31 125.3 840.7 91.4 ~32 Raleigh; NC to Fayetteville; NC Round Trip
    12 04/01 82.8 923.5 87.7 ~32 Dinner; Visit friend in Coats; NC.
    13 04/03 38.5 962.0 87.8 ~32 Walmart; Bowling
    14 04/04 38.7 1000.7 89.7 ~32 Driving around town until Trip A shows 1000 miles.


    Close as I can get it. Since it was ~10 miles, I SWAGGED 9.6 miles . . . close enough.<GRINS>

    Thank you for sharing! Hopefully the table format makes it clear what a remarkable achievement. When I did my 1000 mile tank in a Gen-3, I used cruise control at a speed of 24-25 mph. Your Gen-4 at ~32 mph is blowing away the previous version. Well DONE!

    Bob Wilson
     
    iplug, telmo744 and Sergiospl like this.
  8. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    496
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    I will take credit for being a patient driver, but the Two Eco is truly a remarkable car. The Raleigh - Fayetteville round trips are very consistent. I would love to get my hands on other Non-Eco models to compare on the same route. We could put to rest the Eco vs Non-Eco mileage question.

    I have also considered filling with E10 on the next tank to see how it compares to this E0 benchmark. That would be useful information.
     
    bwilson4web likes this.
  9. bwilson4web

    bwilson4web BMW i3 and Model 3

    Joined:
    Nov 25, 2005
    25,816
    14,605
    0
    Location:
    Huntsville AL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Thanks @krousdb and @pakitt, we have some credible metrics to compare with the roll-down model. With these data points, I've adjusted the model and it looks like we may have a solution:
    [​IMG]

    I'm OK with adding well documented data points from postings in PriusChat. Note, I am citing the original poster even though they may be bringing data from other sources. Without a proper reference, I can't make it up.

    Bob Wilson
     
    pakitt likes this.
  10. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    496
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    Cooler weather, a bit windier and more rain. Filled up with E10 this time so we will see how much difference it makes if any.
    IMG_20160420_190128103_HDR.jpg IMG_20160420_190420042.jpg
     
    Sergiospl, telmo744 and bwilson4web like this.
  11. Mr.MPG

    Mr.MPG Junior Member

    Joined:
    Mar 29, 2016
    29
    50
    0
    Location:
    Southern California
    Vehicle:
    2016 Prius
    Model:
    Four Touring
    My is close 767.2 miles averaging 77.5 MPG! 2016 Four Touring!
    upload_2016-5-3_9-11-49.png
     
    krousdb likes this.
  12. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    496
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    Nice to finally see some great numbers from a Touring!
     
  13. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    496
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    First full tank with E10. Used the Air Conditioning for about 180 miles. See Fuelly for details. IMG_0426.JPG
     
    telmo744 likes this.
  14. Mr.MPG

    Mr.MPG Junior Member

    Joined:
    Mar 29, 2016
    29
    50
    0
    Location:
    Southern California
    Vehicle:
    2016 Prius
    Model:
    Four Touring
    800.2 Miles on 10.8Gal tank, AVE 78.6MPG, driving mode Normal, Temp in the morning between 61-66F, after work 70-74F, tire Pressures; Front 42PSI, Rear 40PSI. Prius 4th GEN Silver 4 Touring, bought in March this would be my 3rd fill up.
    upload_2016-6-8_8-36-27.png
    upload_2016-6-8_8-39-16.png
     
  15. krmcg

    krmcg Lowered Blizzard Pearl Beauty

    Joined:
    May 15, 2008
    2,592
    2,385
    0
    Location:
    Whittier, CA
    Vehicle:
    2016 Prius
    Model:
    Four
    I am impressed. My best is only 730 miles.
     
  16. HamiltonPrius

    HamiltonPrius Member

    Joined:
    May 17, 2016
    107
    64
    0
    Location:
    Parts unknown (in the USA)
    Vehicle:
    2016 Prius
    Model:
    Two
    Halfway to the promised land.....


    [​IMG]
     
    #56 HamiltonPrius, Jun 12, 2016
    Last edited: Jun 12, 2016
    krmcg and PriUncut like this.
  17. JohnF

    JohnF Active Member

    Joined:
    Aug 22, 2009
    497
    427
    0
    Location:
    Essex, CT
    Vehicle:
    2016 Prius
    Model:
    Two
    Surprised to get my 800 mile tank. I hadn't checked the total mileage tripmeter until the fuel gauge got really low, so I wasn't expecting it:

    806.4 miles, 10.466 gal., 80.0 mpg on the display, basically the same as others have seen - but still fun.

    Factoring in 1.28% odo error gives 78.04mpg, so the display mpg reads 2.4% high overall.
     
  18. krousdb

    krousdb NX-74205

    Joined:
    Jul 16, 2005
    580
    496
    47
    Location:
    Raleigh, NC
    Vehicle:
    2016 Prius
    Model:
    Two
    This is probably my last 800 mile tank until the temps cool off. 50% A/C use and higher max speed. 55 MPH up from 45.
    IMG_0431.JPG
     
    JohnF and krmcg like this.
  19. krmcg

    krmcg Lowered Blizzard Pearl Beauty

    Joined:
    May 15, 2008
    2,592
    2,385
    0
    Location:
    Whittier, CA
    Vehicle:
    2016 Prius
    Model:
    Four
    801.3 miles travelled. MFD MPG 77.1 (both personal records)
    11.148 gallons = 71.9 calculated MPG.
    100 miles driven with need fuel icon illuminated.

    image.jpeg image.jpeg 801.3
     
    JohnF, krousdb and bwilson4web like this.
  20. JohnF

    JohnF Active Member

    Joined:
    Aug 22, 2009
    497
    427
    0
    Location:
    Essex, CT
    Vehicle:
    2016 Prius
    Model:
    Two
    Another 800 mile tank. I probably could have gone further but I chickened out when the DTE went to 0.

    806.6 miles, 10.272 gal., 80.2 mpg on the display. Factoring in 1.28% odo error gives 79.52mpg, so the display mpg reads 0.9% high for this tank. The error was 2.4% high for the last tank, so I suspect a fill variation even though I followed exactly the same procedure at the same gas station for both tanks (different pumps I think).

    The significance of mpg numbers is hard for people to grasp, so I came up with this explanation: Imagine I had an SUV instead and was getting 25mpg with it (probably a bit optimistic). With gas at $2.50/gallon as it was here today, in effect I'm paying 80 cents a gallon for gas for the Prius. At 50mpg in the Prius I'd be paying $1.25/gallon.

    I'm also avoiding 2-3 gas stops per 800 miles, at 10 minutes? per fillup.
     
Loading...