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Something wrong with my Prius II - It takes more gas than it advertised.

Discussion in 'Gen 3 Prius Fuel Economy' started by hschen, Aug 24, 2009.

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  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Could that have been from CA-91 to drive south on CA-241 towards the toll stations at the crest?
    33 55' 17.00" N 117 42' 08.00" W - 114 m altitude
    33 49' 31.00" N 117 42' 59.50" W - 426 m altitude (6% grade)
    ​
    Typical speeds on this leg? (80 mph or more?)
    Are you running 87 octane?

    If this is a common route, you might want to try 89 octane. What this will do is allow the ICE to provide additional power up the long grade without drawing into the traction battery at high speeds, 80+ mph. The other alternative is to keep speeds at or under 75 mph using 87 octane.

    Bob Wilson
     
    #81 bwilson4web, Sep 9, 2009
  2. hschen

    hschen New Member

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    Wow, Bob, I am totally impressed. You nailed right on. It was the long uphill from CA-91 southbond on CA-241 toward the tollbooth. Wife delivered the new Prius to me from Phoenix to Irvine. She said on no issue on I-10, CA-60 to CA-91 until reached CA-241. She was convinced that without power mode, Prius wouldn't get up to the hill. With power mode on, she said she was able to accelerate/maintain around 65-70 mph on the long hill drive.
    Thanks for your detailed info.
     
    #82 hschen, Sep 9, 2009
  3. tpfun

    tpfun New Member

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    Heh, driving slow in LA traffic is near suicidal.
     
    #83 tpfun, Oct 13, 2009
  4. cwerdna

    cwerdna Senior Member

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    understanding the EPA tests

    I haven't paid close attention to this thread (lack of time and don't have a Gen III) but DO read http://priuschat.com/forums/other-c...uth-about-epa-city-highway-mpg-estimates.html about the EPA tests.

    Most fuel-efficient cars shows what Consumer Reports got. http://www.consumersunion.org/Oct_CR_Fuel_Economy.pdf at the end has info on their tests vs. the old (pre-model year 2008) EPA tests.
     
    #84 cwerdna, Oct 13, 2009
  5. hschen

    hschen New Member

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    After proving that I can do 60+ mpg in my daily commute if I want to, I started speeding up to normal speed like 70+ or even 80+ mph. Of course, then my commuting mpg dropped to around 55.
     
    #85 hschen, Oct 13, 2009
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