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first fillup 53mpg versus eco estimate 48mpg?

Discussion in 'Prius c Fuel Economy' started by novasquid, Mar 18, 2013.

  1. novasquid

    novasquid Junior Member

    Joined:
    Mar 3, 2013
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    Location:
    Northern VA
    Vehicle:
    2013 Prius c
    Model:
    Four
    i filled up my prius C for the first time over the weekend, and the trip B eco reading was showing an estimate of ~48mpg. the trip B hasn't been reset since i rolled out of the dealership. my manual calculations showed 53mpg (318 miles / 5.967 gallons). my understanding from reading other posts was to expect 2-5mpg below the eco estimates. but it's actually 5mpg higher?

    i know, it's just the first fillup, but has anyone else ever experienced a higher actual mpg than the estimate?
     
    #1 novasquid, Mar 18, 2013
  2. Corwyn

    Corwyn Energy Curmudgeon

    Joined:
    Mar 6, 2011
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    Location:
    Maine
    Vehicle:
    2007 Prius
    Model:
    II
    There is a lot of uncertainty in both displayed MPG and calculated MPG. Neither should really be called 'actual'.

    However, you have made a good start, keep it up. But don't be too disappointed if your next tank is lower.
     
    #2 Corwyn, Mar 18, 2013
  3. ztanos

    ztanos All-around Geek!

    Joined:
    Jan 10, 2013
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    Location:
    Cumming, Georgia
    Vehicle:
    2012 Prius c
    Model:
    Four
    Never trust that the dealerships "full" tank was actually full, either. So, first tank is hard to gauge.
     
    #3 ztanos, Mar 20, 2013
    xpcman likes this.
  4. Raidin

    Raidin Active Member

    Joined:
    Jan 21, 2013
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    Location:
    Houston, TX
    Vehicle:
    Other Hybrid
    Model:
    N/A
    I just got my first negative calculation from my car. I started logging the difference a while back on my fuelly log, and I'm always about 2 to 3 mpg less than what my car says. Today I decided to drive faster than normal (70-75 mph instead of my usual 55 mph) for about 40 minutes. The result was a 1.4 mpg increase over what the car told me I got. Quite intriguing.
     
    #4 Raidin, May 8, 2013
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