E85 VS HELLA EXPENSIVE 91
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This is a discussion on E85 VS HELLA EXPENSIVE 91 within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; I'm thinking about going to E85 conversion cuz 91 octane is getting WAY to expensive here. Currently it is .75 ...

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    Registered User frenziedcage's Avatar
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    E85 VS HELLA EXPENSIVE 91

    I'm thinking about going to E85 conversion cuz 91 octane is getting WAY to expensive here. Currently it is $3.75 a gallon and I wouldn't be surprised if it was to be over $4.00 a gallon when summer hits us. I was just wondering if E85 would be saving me any money really? Currently E85 prices in my area are $2.89 a gallon so right there I'm saving over a $1.00 a gallon I know E85 sucks it down quicker but mathematically wouldn't I be saving a little money over 91?

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    Registered User wrxnguyen's Avatar
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    Lol it's already $4.15 in southern California. I'm pretty sure it's more expensive in L.A.

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    Registered User frenziedcage's Avatar
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    Well obviously lol. I don't doubt that for a second. $3.75 is expensive here tho.

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    Registered User wrxnguyen's Avatar
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    Yeah sorry I didn't answer your question but I'm sure it'll save and all add up eventually.

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    Moderator Donkey's Avatar
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    For E85 you will need at a minium 800-1000cc injectors,upgradede fuel pump and an ECU retune. Your MPG's will be less with E85 as it requires more fuel per burn cycle to reach it's stoichometric ratio.
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    MAINEiac 11blackSTi's Avatar
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    If you drive your car like a grandma on e85 at that price vs. drive your car like a bat out of hell on the gas, then you will save money on the e85.

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    Then driving like a grandma on gas would probably be cheaper

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    Pro Manscaper Mikie13's Avatar
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    Your MPGs will go down significantly, meaning you will have to fill up more. So, your cost savings would probably be negated.
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    \_(ツ)_/ Rambo's Avatar
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    Quote Originally Posted by Mikie13 View Post
    Your MPGs will go down significantly, meaning you will have to fill up more. So, your cost savings would probably be negated.
    Plus all the upfront costs of injectors, fuel pump, and tune. I'm sure in the very long term it would start to save money (like 10+ years), but you'd probably have sold the car by that point.

    $3.85/gal isn't that expensive.
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    Master Baiter EJ257's Avatar
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    Quote Originally Posted by frenziedcage
    I'm thinking about going to E85 conversion cuz 91 octane is getting WAY to expensive here. Currently it is $3.75 a gallon and I wouldn't be surprised if it was to be over $4.00 a gallon when summer hits us. I was just wondering if E85 would be saving me any money really? Currently E85 prices in my area are $2.89 a gallon so right there I'm saving over a $1.00 a gallon I know E85 sucks it down quicker but mathematically wouldn't I be saving a little money over 91?
    I filled up @ $4.30/gallon this week...

    The other thing you need to consider is that not all E85 is the same. Winter-blend E85 tends to be closer to E70 here. E85 isn't readily available where I'm at, and if I ever made the conversion, I would want an ethanol content analyzer (Zeitronix makes one), so I was aware of what I was getting. That would be beneficial both to notify you of the quality of E gas you got, but also when you switched between pump and E (since there will likely be residual fuel left over, unless you drain the tank manually and keep a supply at home to get you to the gas station to complete the fillup).

    Back to your original question, once you got over the initial cost investment of hardware/software required to run E85, at those prices, it should be about equal in terms of operational fuel costs.
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    Try buying gas here in NZ if you think US$4.00/Gal is expensive.

    Here is about NZ$2.30/L. Which is about NZ$9.20/Gal. That makes it about US$7.70/Gal.

    It costs me around NZ$120 every 2 weeks in gas.

  13. #12
    Registered User frenziedcage's Avatar
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    Damn I could buy 112 oct for like $9-14 a gallon.

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    NZ$2.30 is for 98RON (106-108MON).

    NZ$2.20 for 95RON (103-105MON)

    NZ$2.15 for 91RON (99-101MON)

    We use RON, I think you guys in the US use MON?

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