E-15 questions

Discussion in '2005+ Ford Mustang v6 4.0L Tech' started by osgruber327, Mar 8, 2021.

  1. osgruber327

    osgruber327 Junior Member

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    Morning all,
    As I see the rising fuel prices, a question arises...... can the 4.0 v6 in my 06 convertible drink the E-88 or E15? I'm pretty sure Flex-fuel is out of the question but what about the others? Maybe a flex-fuel blend? 1/3-2/3?
    25%-75%?
    Thanks!

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  2. jewc75

    jewc75 S197 Junkie S197 Team Member

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    Fuel mileage goes down with more ethanol content. Just keep that in mind about fuel prices.
     
  3. stkjock

    stkjock ---- Madmin ---- Staff Member Administrator Super Moderator S197 Team Member

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    E-88 is flex fuel.. that means 88% ethanol... your car will not run on that blend.
     
  4. osgruber327

    osgruber327 Junior Member

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    Thanks for the information...... what about E-15? According to the pump, its only 15% ethanol.....

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  5. stkjock

    stkjock ---- Madmin ---- Staff Member Administrator Super Moderator S197 Team Member

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    yes, it run on E15, but take note of what jewc75 commented above....
     
  6. RED09GT

    RED09GT Equal Opportunity Offender S197 Team Member

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    If you run E15 consistently, the ECU will adjust the fuel trims accordingly. The OE calibrators assume that most gasoline is between 5-10% ethanol and the ECU has an adjustment range that it can compensate for so it compensates in the same manner that it will for gasoline with 0% Ethanol.
    As said before, you will see your mileage decrease.
     
  7. Juice

    Juice forum member

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    That year is not certified to run E15. You can only run e10 or less legally. It may run fine on e15, but its not worth it.
     
  8. osgruber327

    osgruber327 Junior Member

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    Thanks everybody!
    I appreciate all your information and advice

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  9. 13v6

    13v6 Member

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    E88 is only 15% ethanol, raising the octane to 88. NOT 88% ethanol. Most modern cars can use up to 15% ethanol.
     
  10. stkjock

    stkjock ---- Madmin ---- Staff Member Administrator Super Moderator S197 Team Member

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    I disagree, E85 is then what? 15% ethanol???? No, it's 85% ethanol in summer blend ( can be 70-85% depending on seasonal blend)

    Keep in mind I've been running a E85 car for 11 years....
     
    jewc75 likes this.
  11. jewc75

    jewc75 S197 Junkie S197 Team Member

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    E15 is 15% ethanol. Here in Texas some of our stations sell E15 at the pump.
     
  12. 1950StangJump$

    1950StangJump$ forum member

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    I suspect the OP misstated it . . . if he's referencing Sheetz and other like gas stations, they now offer "88" octane fuel that is also E-15. The 88 part is not a reference to ethanol content.
     
  13. osgruber327

    osgruber327 Junior Member

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    Correct, I was referring to Sheetz here in south central pa...... It is labeled as e88 - but it is in fact 15% ethanol......
    Is this somthing that I can run with damage to the fuel system / engine?
     
  14. Juice

    Juice forum member

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    If your car is not certified for 15% ethanol, you cannot run it legally.
     
  15. stkjock

    stkjock ---- Madmin ---- Staff Member Administrator Super Moderator S197 Team Member

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    It's clearly marked as "88" not E88

    [​IMG]
     
  16. osgruber327

    osgruber327 Junior Member

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    I'm really not concerned about the legality of it, I was inquiring about the possibility damage to my engine.
     
  17. osgruber327

    osgruber327 Junior Member

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    You are correct sir!
    My mistake.
    Sometimes the mind sees what it wants to.
    Its also come up in price in the last few days.....
     
  18. Juice

    Juice forum member

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    The potential damage is from running lean. Yes, you could cause damage. Cant say for certain.
     
    jewc75 likes this.
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