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One-Year Old Fuel

Discussion in 'Prime Care, Maintenance and Troubleshooting' started by Tideland Prius, Mar 31, 2021.

  1. Tideland Prius

    Tideland Prius Moderator of the North
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    Still waiting for this message to appear:

    upload_2021-3-31_15-55-28.png

    Is it actually based on the date in the car, a sensor in the fuel tank or simply "when was the last time the fuel door was opened"?

    Cause if it is the latter, that's not a fool-proof system.

    It's been just over a year since I last refuelled and I have 1/2 a tank left. I did open the fuel door once in the last year by accident when I was fumbling for the "charge timer" button.
     
    fuzzy1 and Salamander_King like this.
  2. mr88cet

    mr88cet Senior Member

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    Interesting! Historically (pre-COVID19) I’ve gone to the gas station once every 2-3 months, each time putting in 2-3 gallons, to avoid the gas getting too stale in the tank.

    Ironically, I’ve actually used half-again to double the amount of gas in the COVID-19 year (years?!): we get so restless roosting in the house that we tend to take a joy ride around the picturesque South and West — most such routes taking a little more than can fit in a single charge.
     
  3. Salamander_King

    Salamander_King Senior Member

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    Humm, Are you going to wait for the notice to appear to satisfy our curiosity or refresh the stale gas to prevent potential damage?
     
  4. jerrymildred

    jerrymildred Senior Member

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    To fuel or not to fuel. THAT is the question.

    What a dilemma!! :D

    Seriously, it would be nice to know what resets the timer. I'll probably never know the answer from experience since my record is just over six months.
     
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  5. FuelMiser

    FuelMiser Senior Member

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    If you take them at their word, it would involve keeping track of cumulative gallons added over a sliding 12-month period. It wouldn't matter the quantity left in your tank or opening the fuel door. Assuming your last fill-up was over 12 months ago, I'd keep watching for the message.
     
  6. Buzzhead

    Buzzhead Non-Interference w/ devel of pre-Warp civs

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    I finally got the "please refuel" message this week after not having refueled since Oct 2019. I was down to one/eighth of a tank or so. The message came up every time I started the car, but missed it when not looking at the MID when putting it in gear. Put 3 gallons in, not quite up to half a tank, and that seems to have satisfied the 5.3 gal per 12 month computer, since the message went off.
     
  7. Salamander_King

    Salamander_King Senior Member

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    Thanks for the report. So safe to conclude the computer is not that precise. The mandatory refuel is more like 3 gallons in 18 months. I am never going to achieve that frugality with my driving if and when I get Prius Prime again. Maybe if I get Rav4 Prime with a longer EV range, just maybe.
     
  8. Tideland Prius

    Tideland Prius Moderator of the North
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    Well I was gonna wait for the message to satisfy my curiosity but it seems @Buzzhead has solved it; the message comes up at 18 months rather than 12.
     
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