87 octane only fuel allowed?

Discussion in 'Prime Fuel Economy & EV Range' started by IABoy987, Jun 26, 2020.

  1. benagi

    benagi Active Member

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    So it is not just Utah. It is probably all the Costco‘s across the US that’s sale only Regular and premium?
     
  2. fuzzy1

    fuzzy1 Senior Member

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    Yes, as far as I have seen. Which isn't the whole country.

    The same is true at the unattended agricultural fuel station where I fill up dad's farm-ranch vehicles, as well as our non-farm vehicles when the Bank of Dad is paying. (Farm and non-farm vehicles are tracked and reported separately for business fuel tax reasons, with license plate codes entered to unlock the pump.)
     
    #22 fuzzy1, Jul 2, 2020
    Last edited: Jul 2, 2020
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  3. sam spade 2

    sam spade 2 Senior Member

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    That really is NOT a "problem".
    Mid-grade is pretty much a joke.
     
  4. Rmay635703

    Rmay635703 Senior Member

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    Our “Mid-grade” is 88e15 and 5-30 cents a gallon cheaper than 87e10, no joking needed.
     
  5. sam spade 2

    sam spade 2 Senior Member

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    That's because it has 5% more ethanol.
    And the resulting one point jump in octane really isn't significant.

    I would be willing to venture a guess that it isn't like that at ALL stations in your area........because if "blender" pumps are in use, that wouldn't work at all.
     
  6. DavidA

    DavidA Prius owner since July 2009

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    Gas cap. Gas cap. I should go find my Prime manual to look that up. Hmmmm. Gas cap. I must have one of those, right?
     
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  7. fuzzy1

    fuzzy1 Senior Member

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    Check the other side. And you might need to dig through the Owner's Manual to find the hidden release lever.

    Do you remember how and where you plugged in to recharge your first Prius? I know that was along time ago, but if you can dredge up old memories, it should be about the same on this car. ;)
     
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  8. DavidA

    DavidA Prius owner since July 2009

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    [​IMG]

    Still confused. I'll keep looking.
     
  9. Tideland Prius

    Tideland Prius Moderator of the North
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    :LOL::LOL::LOL:
     
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  10. Raytheeagle

    Raytheeagle Senior Member

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    A080D0D8-A693-4E2C-BC28-5F708427CBCA.jpeg
     
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  11. Trollbait

    Trollbait It's a D&D thing

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    Car gas tanks are far better sealed than the plastic cans for lawn mowers. Evaporation and oxidation are what causes gas to go bad. Those aren't going to be happening in a tank sealed tight enough to pressurize. If you aren't using gas fast enough in a PHEV for the computer's liking, you should get a warning to had fresh gas, and if that isn't enough, the car will start burning it to get rid of it.

    So Stabil isn't required.

    That link is talking about gas stored in plastic cans for power equipment. Those cans can be leaky to the atmosphere, specially as they age, allowing a regular change over of air. Which means anything evaporated from the fuel into the headspace of the can can get out, and fresh oxygen can get in to degrade the gas.

    From the link in your link;), "Perfectly stored, most race fuels will last more than a year. If you are not sure you can use the fuel up within 2 years, add a quality fuel stabilizer to the fuel as soon as you purchase it." Accounting for the lower quality of pump gas, you could probably store gas for up to a year without needing a stabilizer, if properly stored; a modern car gas tank counts as proper storage.

    Gas being stale doesn't mean it can't be used. By design, cars can safely run fuel of octane lower than their requirement. Efficiency will be lower, and the engine will run rougher. Adding fresh gas will improve those.

    Costco probably decided to save money by not installing blender pumps or a third storage tank. Or they wanted to force turbo cars there into buying premium.

    If you ever need midgrade, and can't get it, it is 2 parts premium to 10 parts regular. mixing it yourself will likely be cheaper than buying from a pump.

    Wish we had that while I had my turbo Sonic.:(
     
  12. Rmay635703

    Rmay635703 Senior Member

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    no not every station but the ones with favorable pricing all have e15 in place of the mid grade

    All that is needed to support every fuel octane/ethanol content is a simple 3 tank stack As follows
    (most stations these days have 4 tanks)

    85e0
    91e0
    E85

    Blending between these Three different fuels can provide

    87e10
    89e10
    93e10

    88e15
    90e15
    E85

    87e0
    91e0


    It’s unfortunate that few stations carry all the grades anymore

    Most are carrying the following
    87e10
    88e15
    91e0
    E85
     
  13. sam spade 2

    sam spade 2 Senior Member

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    Not entirely.
    Some of the deterioration is due to impurities and additives breaking down just due to age......and heat.
    Gas stored in a perfect vacuum will still go bad eventually.
     
  14. IABoy987

    IABoy987 Member

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    Took a road trip that got the fuel meter to about quarter full. Since we use Prime for around town and recharge nightly, we refilled with 3 gallons of 87 fuel to bring up to about half full tank.
     
  15. eatriceyo

    eatriceyo Junior Member

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    I mainly pump 87 at Costco and have no problems ever.
     
  16. m8547

    m8547 Senior Member

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    Regular is 85 at all gas stations in Denver and everywhere to the west of that in Colorado. Not sure about the eastern plains ("west Kansas"). I use nothing but 85 in all my vehicles, and I've never had a problem at 4,000 feet or higher. There's about 15% less oxygen at 5,000 feet, so a NA engine will make about 15% less peak power. Worst case is on top of 14'ers, there's about 42% less oxygen. I often see manufacturers doing high altitude testing in Summit County and on Pikes Peak.

    If I had a turbocharged or supercharged car I wouldn't run less than the recommended octane at any altitude.
     
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