Should I drain the fuel?

Discussion in 'Prius c Main Forum' started by PriusII&C, May 26, 2021.

  1. PriusII&C

    PriusII&C Member

    Joined:
    Oct 15, 2013
    176
    66
    0
    Location:
    San Jose, California
    Vehicle:
    2012 Prius
    Model:
    II
    Due to the pandemic, my Prius C has been parked in my garage for over a year with fuel tank full (with added stabilizer). It looks like this will last for another 6 - 12 months. Should I replace the old fuel with fresh fuel?

    The most straight forward way would be to drive it for a few hundred miles and then fill the tank up. But that means renewal of registration with DMV, adding liability/collision insurance coverage then cancelling it, taking the smog test, et. al. Another way would be to drain the fuel out. Either way would require a lot of work.

    Just wonder how long you have kept the fuel in the tank without issues?
     
  2. jburg

    jburg Member

    Joined:
    Jan 27, 2020
    93
    80
    1
    Location:
    RTP, NC
    Vehicle:
    2010 Prius
    Model:
    One
    Without stabilizer E10 fuel should last for 3 months and E0 fuel should last for 6.

    My brother just started driving his '00 Civic again after letting it sit for a year. Similar situation - poured stabilizer in the tank before parking it. He dumped a few bottles of octane booster in the tank then topped it off to mix it and it was fine.

    You could always siphon the fuel or get an electric pump.

    I all honesty, I would be more worried about the accessory/aux battery and hybrid battery pack after letting it sit for a year.
     
  3. GabrielD

    GabrielD Member

    Joined:
    Oct 18, 2019
    174
    67
    0
    Location:
    Romania
    Vehicle:
    2014 Prius+ MPV
    Model:
    V
    The easiest way to assess the condition of gas is to pour a small amount of your stored gas and freshly pumped gas of the same type into two clear glass vessels and do a side-by-side comparison. If the gasoline is only slightly darker than the fresh gas or smells sour, it’s merely old and has probably lost efficacy, but isn’t contaminated.

    If you observe separate layers of gas and ethanol in an ethanol-blended gas (generally, the gas layer will be darker and positioned above the lighter ethanol layer if the fuel has separated), or if the gas is significantly discolored (i.e., the color of milk chocolate or rust) or contains sediment or sludge, it has been contaminated by moisture or the solid by-products of oxidation, respectively.

    Contaminated gas should never be used to power equipment or vehicles; it can promote corrosion or leave sludge or varnish deposits (a thin, transparent brown or orange film) on fuel system components that can irreparably damage them. Dispose of contaminated gasoline at the earliest opportunity because, poor combustibility aside, both the gas and the vapors it emits are still flammable and could cause a fire or explosion if the storage container were to become damaged over time and the gas were to leak into its surroundings.

    [​IMG]
    Photo: istockphoto.com

    Old gas can be used when freshened up with new fuel.
    Old gas is still reusable if combined with fresh gasoline, although the fuel mixture will have lower combustibility, so you might experience engine sputtering or non-starting. To use old gas in gas-powered lawn equipment, fill the fuel tank with one-part fresh gas per one-part old gas. Starting a car will require more horsepower, so if you recently filled the gas tank three-quarters of the way with fresh gas, top it off with old gas and then try starting the car.

    source
     
  4. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    5,918
    2,352
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    YOu are making this MUCH too hard.
    Just register it, get insurance and DRIVE it part time.

    The batteries will like that too.
    Your 12 V probably is DEAD now unless you've had it on a tender.
    That mistake likely has already cost you $150 or more.

    It is likely that:
    The DMV will charge you "back registration" fees when you do get the plates renewed, which might total MORE that just keeping it current would have cost.
    And many insurance companies will not refund any unused premium that is less than a minimum interval........often 6 months.

    Once you do start driving it again, the old OIL should be replaced after a few miles though.
     
  5. dubit

    dubit Senior Member

    Joined:
    Dec 3, 2016
    847
    534
    23
    Location:
    Indiana
    Vehicle:
    2016 Prius c
    Model:
    Two

    You need to be starting it up every other week or so. Doesn't have to be driven...
     
  6. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    5,918
    2,352
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    BUT it has to be in the READY mode for a while to charge the 12 V battery back up.
    And by "starting up" the gas engine should run long enough to get heated up too.

    Might as well just drive it to the store and back.

    What you said is too brief to be correct.
     
Loading...