Two Simple Solutions for Low Fuel Efficiency

Discussion in 'Gen 3 Prius Fuel Economy' started by PriusOnTheFence, Aug 21, 2020.

  1. PriusOnTheFence

    Joined:
    Sep 26, 2009
    69
    26
    0
    Location:
    MA
    Vehicle:
    2010 Prius
    Model:
    II
    This post is not intended for veterans, but for rookies/low-tech users.

    I was experiencing very low efficiency this winter, down to 36 MPG (read, not calculated).

    After reading a number of posts, I made 2 changes:

    --started buying gas from Shell. I used to get it from Kroger. Since it was on the same Rewards system, I assumed it was pretty much the same quality. I saw at least a 5 MPG change.

    --then I also increased the tire pressure to 40 (front) and 38 (rear). I went up to 46 MPG.

    Now that the weather is better, I am back up to 49.7 MPG. Could not be happier.

    Had gone to the dealer and got all sorts of horror stories about changing EGR pipes/valves/coolers etc.

    Try the simple stuff first!

    Btw, does anyone know if I can ask the dealer to see what the lifetime fuel consumption is? Toyota should make it readily available.
     
    Robert Holt and bisco like this.
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    89,780
    40,242
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    you can ask, but they can't read it. only toy corp has the key to that info
     
    PriusOnTheFence likes this.
  3. PriusOnTheFence

    Joined:
    Sep 26, 2009
    69
    26
    0
    Location:
    MA
    Vehicle:
    2010 Prius
    Model:
    II
    I guess they don't want us to know!
     
    bisco likes this.
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    89,780
    40,242
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    likely, they never set aside some harmless things that might be of interest to some owners, and the secret sauce divulges all or nothing.

    that being said, some obd readers provide a lot of interesting data, but i don't think lifetime histories are among them.
     
  5. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    13,935
    7,490
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    Do remember that MPG varies by season, even without anything going wrong with the car itself:

    Why mileage gets worse in winter | PriusChat
    What was your tire pressure down to before this step?
    Of course you can ask! But that doesn't mean they'll have a useful answer.

    I'm not aware of Gen3 Prii having lifetime MPG meters. If it was something you wanted to know, then you should have either kept your own lifetime fuel log, or set aside one of the two Trip meters for that purpose. But the later is susceptible to accidental resets, both by yourself and by the maintenance technicians fumble-fingering it when trying to reset the maintenance reminders.


    For more ideas in tracking down low MPG, read here:
    Fuel economy complaints/queries? Please copy, paste & answer these questions, esp. if you're new | PriusChat
     
Loading...