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Ethanol gas vs non-ethanol gas?

Discussion in 'Gen 3 Prius Fuel Economy' started by alfon, Aug 1, 2009.

  1. 3PriusMike

    3PriusMike Prius owner since 2000, Tesla M3 2018

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    Of course, this quote from the article would be called an "andedote" and not a scientific experiment. There are several keys words here, such as "didn't pay much attention." She also probably didn't pay much attention to the fact that she was driving on I-5 which is a bit mountainous in Oregon...Portland is at sea level and Medford is 1300 feet.

    3PriusMike
     
  2. qbee42

    qbee42 My other car is a boat

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    There are two reasons for banning ethanol in avgas: 1) The ethanol will dissolve hoses and seals not designed for it, and 2) ethanol binds to water and can precipitate out causing fouling problems.

    Tom
     
  3. Carls

    Carls Junior Member

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    I see 46-48 city with mega hills daily, and 53-56 country mostly flats. Ethanol should lessen mileage, but local conditions will effect mileage more (IE fast starts, hills, carrying a load).
     
  4. RickFlashman

    RickFlashman New Member

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    Ethanol came to Florida without any price decrease, just a decrease in MPG. I am very against it, since there is no benefit for the consumer except to increase food prices. When the transition took place, using my scanguage on my old car, I saw a clear 10% drop in MPG, not 3% as mentioned above. Of course, I have also learned since then that the 10% ethanol is not exact, it can vary, so I am convinced that if it makes them an extra penny they are pushing it to 15-20 unofficially.

    I want regular gas back.
     
  5. a64pilot

    a64pilot Active Member

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    No, pretty sure if anything your only getting 10% where the law requires it. ETH is more expensive than gas now, it made sense with $4 gas, now maybe not, at least from just price that is.
     
  6. DonDNH

    DonDNH Senior Member

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    My 52.4 MPG lifetime average over 70K miles has fallen to 50.3 MPG over 93K miles since the introduction of E10 locally.
     
  7. Mark57

    Mark57 2021 Tesla Model 3 LR AWD

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    That's about what I would expect and have seen here locally. I'm sticking with 100%. And here in OKC, Sam's Club has 100% non-Ethanol for $2.12 per gallon this week for members and $2.15 for non-members. Oklahoma City Gas Prices - Find Cheap Gas Prices in Oklahoma Makes the choice pretty easy.
     
  8. john1701a

    john1701a Prius Guru

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    No interest in smog-related emission reduction?

    No interest in long-term transistion to bio-waste sources?

    E10 is all I have ever used in my Prius for the last 9 years. Local research continues to push advancements in the source & refining. It's been working well in-state for us.

    As for food price influence, the switch back to sugar away from high-fructose corn syrup likely has more of an impact than ethanol.
    .
     
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  9. RodJo

    RodJo Member

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    A few years ago my BMW started having problems. Sometimes it wouldn't start, or it would stall, or the check-engine light would come on. I brought it to the dealer and without missing a beat they said "If you're using Mobil (I was) then stop because they put more than 10% ethanol in their E10." I have had fewer such issues since switching.

    I have also discovered an enzyme additive called Star Tron (www.startron.com) that seems to do a good job fighting the ethanol. My local garden center happens to sell the stuff but you should also be able to find it a marine center.