Plug-in Prius results at 10,000 miles

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by Rebound, Oct 8, 2012.

  1. F8L

    F8L Protecting Habitat & AG Lands

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    Great information! :)

    Those are good numbers considering the gloomy cool weather in SF area. I notice a decent drop in mpg when temps are 70F and below compared to 95F+ temps.
     
  2. john1701a

    john1701a Prius Guru

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    It's nice to know there will be people in the waiting for a next generation rollout.

    That anticipation contributes quite a bit to our discussions about owner experiences.
     
  3. lensovet

    lensovet Not your typical youngin :)/BP Brigade 207

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    As long as that anticipation doesn't lead to the glut of cars we have with the current generation…
     
  4. ryogajyc

    ryogajyc Active Member

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    I think this is a little misleading. At 62 MPH and faster, the miles are counted as HV miles, which basically filters out these high speed miles from an EV only "MPGe" calculation which results in an artificially high MPGe number. I think MPGe is only meaningful if counting EV and HV miles and electricity and gasoline consumed.
     
  5. drinnovation

    drinnovation EREV for EVER!

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    MPGe can be used for one source or many. But for overall energy, if the ICE helped when miles are reported then you are correct, it should be the combined usage and Rebounds overall MPGe is 61 for the 10K miles. (In comparison, John's data is 68 MPGe overall).

    Actually filtering out the miles, but counting the kWH would reduce MPGe. So if what ou say about it counting them as EV miles, at that level it is surprisingly good that Rebound had 1500 EV miles if the highway miles were not counted. Is it possible that if in EV mode on the highway (EV-Boost in John speak) that both HV and EV miles are updated?
     
  6. Rebound

    Rebound Senior Member

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    You may be right; I'm only relying on the data I have. I usually turn EV off when I go fast. John logs a lot more data, so maybe he will come up with something better. But if my MPGe is too high, then my MPG must be higher, right?
     
  7. ukr2

    ukr2 Senior Member

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    John,
    You have 3 lines of gas fillups on the MPG Spreadsheet. You have 17 on your link.
    I would like to add your additional gas fillups to the spreadsheet, but your link is missing some of the display info.
    Do you have Metered kWh, and EV Display Gal., Gal Saved, EV % and HV%?

    Can you add the data?

    Thanks.
     
  8. ukr2

    ukr2 Senior Member

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    9G-man,
    Sure would like to see your Gas Fillup data added to the MPG Spreadsheet.
     
  9. john1701a

    john1701a Prius Guru

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    All but "Gal Saved" can be determined based on the numbers collected in that tank & daily data on my spreadsheet.

    Eventually. I'm still trying to finish my 6-month report write-up... which has lots of graphs & detail.
     
  10. adric22

    adric22 Ev and Hybrid Enthusiast

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    Is my math correct? Judging by the "fuel saved by charge" estimate of 34.5 gallons, and assuming gasoline at $4 per gallon, that is only $138 worth of gasoline saved. Really not that much.

    Had he been driving a Volt, by my calculations he would have saved 127 gallons of fuel, working out to $508 of savings.
     
  11. Rebound

    Rebound Senior Member

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    If you show us the math, we will tell you if it appears to be correct, but I predict that you're incorrect.
     
  12. usbseawolf2000

    usbseawolf2000 HSD PhD

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    Surprising and positive results indeed, considering the 2011 Volt is rated 60 MPGe for gasoline and electricity combined composite by EPA.

    I know you are getting 103 MPGe with your Volt because your EV ratio is higher than an average Volt usage.
     
  13. Rebound

    Rebound Senior Member

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    I can tell you exactly how much money my Plug-in Prius saves me. For every 10,000 miles, it's 66.5 gallons and $276.23, using a fuel cost of $4.15/gallon. But this is savings above and beyond driving the world's most fuel-efficient gasoline powered vehicle.

    I happen to have some very good data. I didn't think of this before:

    I've driven the same 85 mile r/t commute for the past six years. I drove 40,000 miles on this commute in my 2010 Prius III, and I tracked mileage on this car with Fuelly where my overall, actual average was 46 MPG.

    I purchased my Plug-in Prius last April, and continued the same 85 mile r/t commute, dutifully recording my mileage with Fuelly, where my overall, actual mileage is 66.3 MPG.

    $4.15/gallon has been the average I've paid since April. In 100,000 miles, I will save 665 gallons of gas and $2,759.75, if the price of gas remains $4.15. I don't count my negligible electric costs (a net rebate of about $2/month).

    Now, you aren't interested in Prius vs Prius Plug-in, you're interested in Prius Plug-in vs. Volt. But unfortunately, I have no idea how much gas I'll consume in a Volt on my 85 mile commute.

    The Math:
    Price per gallon: $4.15
    2010 Prius:
    Mileage: 46
    Gallons/10,000 miles = 10,000 miles / 46 miles per gallon = 217.4 gallons
    Cost for 10,000 miles = 217.4 gallons * $4.15 per gallon = $902.17

    2012 Prius Plug-in:
    Mileage: 66.3
    Gallons/10,000 miles = 10,000 miles / 66.3 miles per gallon = 150.8 gallons
    Cost for 10,000 miles = 150.8 * $4.15 = $625.94
     
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  14. usbseawolf2000

    usbseawolf2000 HSD PhD

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    You cannot charge at work right? What if you use EPA value for the Volt? We should get a ball park.
     
  15. drinnovation

    drinnovation EREV for EVER!

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    Not that surprising.. My estimate for the Pip, using utilities factor for 11miles (and using 95MPGe on that 11 miles and 51city/48 highway on the remaining) is that the PiP would earn an EPA between 58 and 59 (depending on the city/highway mix and which of those are CD and which CS). I've never found the actual weightings defined I am a little surprised that by now Toyota never provided an official estimate (ITs EPA rules but the companies do the testing and report to EPA and choose what to release themselves).


    My 103MPGe is both a higher ratio and way better than EPA driving, e.g. my EV driving average may through sept was 25kWh/100 miles (from the wall) compared to EPAs 35kWh/100miles. With EPA numbers one could never break 95MPGe with a Volt as that the EPA EV mode number.

    How much rebound would use in a Volt depends on his driving style. With 2013 EPA numbers, assuming he uses the CS mode on the highway (e.g.saving EV hold mode, for the slow streets by work) It would 85-38=47 CS highway miles. At 40mpg = that is 1.175 gallons. EPA in the Pip would be (85 - 11) = 74miles at 48 mpg highway = 1.54 gallons, or about 30% more gas would be used in the Pip compared to the Volt.

    If rebound exceeds the EPA in the PiP he likely would in the Volt. Before the volt, I never had a car where I could exceed EPA by 30%, so I find it very easy to do in the Volt.

    This is just a rough estimate (I'll gladly do a more detailed one if rebound provides more info). As I said earlier, there are many good reasons to choose a car, and efficiency is just one of them.
     
  16. Rebound

    Rebound Senior Member

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    I exceeded EPA in the PiP but not quite in the 2010 Prius.

    Whether you exceed EPA in the PiP or Volt has to do with how many miles/day you drive. Well, that and whether you drive like an idiot.
     
  17. Zythryn

    Zythryn Senior Member

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    Bit of an exaggeration. I do agree it is fairly easy to beat EPA numbers though. I would suggest the EPA has pretty much nailed estimating "average" fuel efficiency. I would also suggest it is easy to drive more efficiently than the average driver.
    For example, my car is rated at 38kwh/100 miles by the EPA. In our first week we are averaging 34kwh/100 miles and when driving carefully I have been getting around 31kwh/100 miles.

    I would suggest comparing either EPA to EPA or discount the EPA of the car you don't have personal data for by the percentage you beat EPA of the car you do have personal data for.
     
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  18. DianneWhitmire

    DianneWhitmire High PRIUStess

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    I bought my car on May 9th and am just about to hit 15K mile mark on odo. Still loving it! With gas at $5.50+ here in SoCal, it was a superb decision... and having my HOV stickers again OMG what a relief!! My only glitch was a right front flat but I know what I ran over... and had a new tire pretty fast.
     
  19. Rebound

    Rebound Senior Member

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    What I mean is this: If you drive ten miles between charges, you will get over 100 MPG. If you drive 150 miles between charges, your mileage will be about 55.

    No other type of car has its mileage distance-bound in this way. If I get a charger at work, my MPG will increase by about 10, because I will cut my distance between charges in half.
     
  20. jsfabb

    jsfabb Active Member

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    When comparing a Volt vs a PiP, you still have to consider the cost of charging. Try his 85 mile r/t using electrical costs. I suspect that the Volt will come out ahead, but not by 30% since it does use more electricity.
     
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