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Two Year Update!

Discussion in 'Gen 2 Prius Main Forum' started by Tideland Prius, Oct 25, 2006.

  1. Tideland Prius

    Tideland Prius Moderator of the North
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    Alright, so it's my car's b-day today haha.

    Here are the two year total stats.

    Total mileage: 36,363.7 km
    Total cost of fuel: Cdn$1,669.05
    Total amount of fuel used: 1801.896 litres
    Total cost of maintenance: Cdn$114.70

    Lifetime Average:
    Calc'd: 5.06L/100km
    MFD: 4.83L/100km


    1st year's stats:
    Total mileage: 18,869 km
    Total cost of fuel: Cdn$822.69
    Total amount of fuel used: 949.296 litres
    Total cost of maintenance: Cdn$59.90

    Lifetime Average:
    Calc'd: 5.14L/100km
    MFD: 4.94L/100km
     
    #1 Tideland Prius, Oct 25, 2006
  2. efusco

    efusco Moderator Emeritus
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    Congrats. I just passed the 3 year mark on my Prius myself, right at 50k miles, still less than 1000 gallons of gas used and averaging 53.1mpg over the life of the car (actual). Couldn't be happier.
     
    #2 efusco, Oct 25, 2006
  3. nyconrad

    nyconrad Cconrad in Virginia

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    After only 3 months and 4K miles, I'm looking forward to achieving your levels.
     
    #3 nyconrad, Oct 25, 2006
  4. Pious

    Pious New Member

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    Congrats! You named your car after a big cat-like anime character?
     
    #4 Pious, Oct 26, 2006
  5. Tideland Prius

    Tideland Prius Moderator of the North
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    My ex did.
     
    #5 Tideland Prius, Oct 26, 2006
  6. ken1784

    ken1784 SuperMID designer

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    <div class='quotetop'>QUOTE(Tideland Prius @ Oct 26 2006, 04:14 AM) [snapback]338159[/snapback]</div>
    Thank you for the data.
    However...
    Calc'd mileage looks 1212.199 / 363.637 = 3.33 L/100km
    Again...
    Calc'd mileage looks 949.296 / 188.69 = 5.03L/100km

    What's wrong?

    Ken@Japan
     
    #6 ken1784, Oct 26, 2006
  7. Tideland Prius

    Tideland Prius Moderator of the North
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    <div class='quotetop'>QUOTE(ken1784 @ Oct 25 2006, 11:34 PM) [snapback]338460[/snapback]</div>
    Thanks. I corrected it in my first post. It should read 1801.896 litres.

    I did the calculation the way you did and got the answers you did, which, as you've pointed out, is different from what I posted as the MFD and calc'd average.

    It's weird. To get the lifetime MFD and calc'd averages, I just took the values of each, totalled and divided by the number of tanks.

    i.e. I have Calc'd and MFD average for each tank in each row. I totalled them up and divided by 66 tanks.

    Not sure why it's different than if we calculate the way you did.
     
    #7 Tideland Prius, Oct 26, 2006
  8. vincent1449p

    vincent1449p Active Member

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    <div class='quotetop'>QUOTE(Tideland Prius @ Oct 26 2006, 02:56 PM) [snapback]338463[/snapback]</div>
    I think you are doing the average of the averages. If you calculate this way, your result might be skewed because the distance travelled for each tank are not the same.

    To compare Calc'd against the MFD, you need to have a weighted average by the distance travelled per tank. You can do this by adding one more column to calculate the fuel used as reported by the MFD for each row. Then take the sum of this for the total fuel used as reported by the MFD and divide by the total distance * 100. hope this helps.
     
    #8 vincent1449p, Oct 26, 2006
  9. Tideland Prius

    Tideland Prius Moderator of the North
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    Hmm.. ok, that gives 4.955L/100km.

    That's the calc'd mileage not the MFD right cause the total fuel used is how much I pumped in and has nothing to do with what teh MFD says.

    So how would I compare calc'd vs. MFD averages.
     
    #9 Tideland Prius, Oct 26, 2006
  10. vincent1449p

    vincent1449p Active Member

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    Lifetime Calc'd Avg can be determined from your gas receipts but Lifetime MFD Avg is not so straightforward because your 2005 Prius MFD always reset after refuel, no?

    OK, I'll use your Oct data as eg.

    Total Mileage: 36363.7km
    Tank Mileage: 604.1km

    MFD Avg: 4.4L/100km
    Calc'd Avg: 4.64L/100km

    Price per litre: 92.9¢
    Fuel Cost: $26.21
    Fuel Added: 28.058
    Fuel used as reported by MFD: 4.4/100*604.1=26.580

    Total Mileage: 37081.2km
    Tank Mileage: 717.5km

    MFD Avg: 4.4L/100km
    Calc'd Avg: 4.48L/100km

    Price per litre: 93.4¢
    Fuel Cost: $30.00
    Fuel Added: 32.117
    Fuel used as reported by MFD: 4.4/100*717.5=31.570

    Total mileage: 604.1+717.5=1321.6 km
    Total amount of fuel used: 28.058+32.117=60.175 litres
    Total Fuel used as reported by MFD: 26.580+31.570=58.15 litres

    Lifetime Average:
    Calc'd: 60.175/1321.6*100=4.55L/100km
    MFD: 58.15/1321.6*100=4.40L/100km

    These are just 2 tanks Lifetime Avg, you can do this for the rest of your 64 tanks data.
     
    #10 vincent1449p, Oct 26, 2006
  11. Rick Grahn

    Rick Grahn New Member

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    I have 53,000 miles on my '05.
    I average 47.4 MPG (lots of highway driving).
    Including all maintenance, the extended warranty, and even repairs (2,500 in parking lot incidents-not my fault!), my total cost of ownership has been less than $.10 per mile.
    I get reimbursed $.44 per mile for about 90% of those miles, so I make out just fine. I will be able to pay cash for a new prius before I get to 100,000 miles.

    I could not be happier with my prius.
     
    #11 Rick Grahn, Oct 27, 2006
  12. Tideland Prius

    Tideland Prius Moderator of the North
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    <div class='quotetop'>QUOTE(vincent1449p @ Oct 26 2006, 07:08 PM) [snapback]339047[/snapback]</div>
    makes sense.
     
    #12 Tideland Prius, Oct 27, 2006
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