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Toyota Prius MPG-Real World Numbers



  • Guess I have to check what next tank will do. thx
  • aghoshaghosh Posts: 16
    edited December 2011
    Thanks Backy and Bobw3. Bob, you are right on the money-the engine rarely shuts down at stoplights now, but earlier it seemed to shut down if I had to stop for more than like 10 seconds.
  • Just aquired my gorgeous 2010 Prius for $15,400 (has 45K on the oh-do). So far, after just 1/2 a tank, my car seems to be averaging only 47mpg according to Prius trip computer )which means I am probably getting just 45 mpg). I just placed more air in the tires and am learning from all of you how to goose more mpg from the beast. Janaury is a horrible time to set the bar for this car, so perhaps with warm weather and a few tankfuls I will see something over 50 mpg. The problem is my city commute is only 8 miles one way, and the car is barely warmed up by the time I get to work or to home. I have started to carefully track my gallons per fill-up and my odometer readings, so I should know in a month what my true MPG is going to be.

    On the freeway I easily achieved a mpg over 50 mpg . . .which i find a little odd given the EPA estimates--but I realize athose estimates are based on paritial usage of the EV mode in the city, something that can't be accomplished on the freeway.

    Anyway, I am a total computer/mileage geek, and so I am completely in love with the "geek-out" experience offered by the Prius computer readouts and such. It truly is an engineering marvel.

    I dont think my tires are low rolling resistance tires . . .they are Westlake SP-06 . . .seem to be a softer tire made more for traction and/or quietness versus low RR. Seet this link and maybe you can comment on them? and recommend another tire? Is the "Michelin Energy Saver A/S" my best best?

    Thanks so much.
  • jayriderjayrider Posts: 3,251
    If you are averaging 45 mpg on an 8 mile commute you are doing great -- really great. The $500 you will spend for new tires won't change much. Wait until you need them.
  • bobw3bobw3 Posts: 2,997
    edited January 2012
    i agree with jayrider...45mpg on an 8 mile commute in cold weather is really good.

    One trick I learned with my '06 Prius in cold weather is to keep the temperature high on the heat setting (about 77 deg) but after the car is warmed up inside to turn the fan to the Off position. This seems to prevent the car from running so much at stop signs and traffic lights, but keeps the warm air "floating" inside the cabin as the car is moving.

    Or you can just turn the fan to the OFF position when you come up to a light and then turn the fan back on when you start driving again. Personally I wish the Prius had an "ECO-CLIMATE" control setting that would automatically do this to prevent the engine from running when stopped just to keep the hot air blowing in the cabin.
  • Sorry folks--when I typed that I am averaging 47 mgp, I should have made clear that this is reflective of ALL my driving to date, not just my 8-mile commute; the average for my 8 mile commute is much lower and is screwing up my overall average. As you all know, the first five minutes in the Prius gets you about 25 mpg. My 8 mile commute is about 15 minutes in length with Atlanta's typical city traffic stop and go.

    I brought the car home from the dealer with about 1/2 a tank and averaged 47 mpg on what was left of that first tank, as I reset the trip odometer when I took possession of the car. I then tanked up the gas on Saturday and so far have driven 98 miles . . . and so far my average has dropped to 44.5 mpg . . .my 8-mile commute makes up a fair share of my driving. If i had realized that the first five minutes of running time gouged the MPG this severely, I wouldnt be as disappointed as I am now . . . I would sure like to average 50 mpg and realize the cost savings . . . maybe I should move to the suburbs and do the 45 minutes commute :-)

    Anyway, i tend to do longer drives on weekends, and with the 3-day weekend coming up we will see what my MPG turns out to be on my first tankful. In the meantime, thanks to all of you for your suggestions. The fan suggestion is a good one that I hadn't thought of, so thanks much.
  • On two tanks I only got 43-44 mpg via miles/gals to fill. The TripA CONS display showed 47-48, so about 10% inflated. I'm guessing most Prius reviews are using the inflated value vs actual mileage calculation.

    Still pretty happy, but not as astonished as I once was.
  • OK the verdict is in: I drove 405 miles on my first tank (was down to one bar, but the bar had not begun to blink yet---I was supposedly 40 miles from empty but I know this car has a 2 gallon reserve tank, and for good reason). Anyway it took 8.886 gallons to fill it up. So 405/8.886 = 45.6 mpg. My Trip A display showed 47.2 mpg. I am happy that I got 45 mpg, but gosh I was hoping to be one of those lucky folks who owns a Prius that gets 55plus mpg.


    1) dealership where I purchased the car (non-Toyota dealer) did not put synthetic oil in the car, so I intend to do that and perhaps see some increase.

    2) the cold weather of late has not helped the mileage. Even Atlanta gets to freezing temps every now and again

    3) I'd like to hyperinflante the tires and see what happens.

    Time will tell. But I know the single biggest factor in my own mpg are themany short trips I take (very short work commute, etc).
  • So far, I have driven my used 2010 Prius 1,343 miles on three fill-ups of a total of 27.35 gallons of regular unleaded fuel (10% ethanol). Those numbers yield an actual MPG of 49.10. However, in keeping with the optimistic tendency of the computer, the car calculated my mileage to equal 51.1.
  • :( I just purchased a Prius 2011 a few weeks ago, have only 200 miles and change on it and so far the MPG shows as 32.4, what am I missing? My commute is only 3 miles long each way...can someone help with some guidance?
  • It is your short commute (3 miles) which is hardly enough to warm up the car. On the bright side the same occurs with conventional cars except that you still get better MPG with the Prius. Take it for a long drive (a trip on the HWY and another trip in the city) and see if it is better.

    Enjoy your new wheels!
  • I hate to be the one to break it to you, but I found out the same thing; a short commute kills gas mileage as it takes the Prius 10 minutes or so to charge the battery so that you can run on battery assisted power. After that 5 to 10 min interval passes, your mileage will increase significantly. Take it on a long road trip and watch what happens.
  • Wow, thank you all for your responses, I thought I was going crazy... Thanks, really. :D
  • chiplchipl Posts: 3
    Would hate to see what my Subaru 2003 Baja would get doing a 3 mile commute My commute is 10 miles taking 20 to 30 minutes depending on traffic along back roads.

    Right now I get 20mpg in the Baja, the 32mpg by prius2007's experience would be nice to see. And looking at the site, the low of 37mpg on the 2011's I have sights on would be even better.

    Thinking of doing a rental from the dealership I plan on buying from for this coming weekend to see what my typical driving might bring. Hefty price tag for the Prius for some of us.
  • sthogesthoge Posts: 28
    On my 2008 Prius IV, I get around 45 in the winter and 52 in the summer. I also have a 10 mile commute each way to and from work. It is mostly flat with a couple of hills. The speed varies between 35 and 30 mph. It usually takes around 10 to 15 minutes for it to warm up, then the graph shows a great increase in mileage. Mileage is calculated by hand and tends to be around 2 to 3 mpg below the displayed average.
  • I agree with you Chip, it is a hefty price tag. I found a 2010 Prius II with 45,000 miles on it for $15,400, and I am very happy with it . . . averaging 49 mpg (51 mpg according to the optimistic Prius computer).

    Also, the rental is a good idea and you can see what kind of mileage is delivered by your commute conditions. As they say, "Your mileage may avary".
  • gopriusgoprius Posts: 15
    51 mpg calculated after fillup. car's computer said the MPG was 54.6 MPG.

    Trip A will be reset after each fillup and Trip B will be used to look at the long term mileage...
  • hansjhhansjh Posts: 2
    I have done this for the last 13000 miles (bought it new). On average, my calculated mpg are about 3 less than Toyota calc's when measuring just one tanks worth. (Your Trip A) I get anywhere from 51 to 48. (Significantly lower in winter when temp is down). My longterm (your Trip b) measures 51.8 over last 13000 miles, but calculated it is more like 49.2. Toyota does not calculate averages very accurately.
  • New to this board and have found it incredibly helpful while choosing a new car! I just bought my 2010 Prius III last week. After 1 tank and around 470 miles, here is my data:

    Computer 54.3 mpg
    Calculated 50.2mpg

    My drive is 60-70% freewaY. My primary job is 60 mile commute on primarily flat highway. My 2nd job is 20 miles on hilly backroads. Hoping to get my next tank closer to 55mpg... been working on driving techniques I have been reading about around the boards, yt, etc.
  • bobw3bobw3 Posts: 2,997
    For your 60 mile highway commute, what sort of speeds are you driving. For me there's a pretty big MPG difference between a constant 65mph and a constant 75mph. If you can keep your speed closer to 60mph even better.

    And if you think about it, driving 60mph for your 60 miles will take one hour. If you drove 72mph, then it take 50 minutes. If you drove a constant 60mph you'd probably get close to 60mpg, so that would be on gallon of gas. At 72mph it might be down to 45mpg and you'd use 1.33gal of gas, or about $1.25, or about $2.50 round trip, or about $12.50/week or $600/year.

    The question is whether or not the $600/year is worth the extra 10 minute commute each way. That's a personal decision. My commute is only 20 - 25 minutes depending on my speed, so for me I keep the speed down to increase my MPG, plus it gives me a chance to listen to more news on the radio driving to and from work.
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