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Thread: Ethanol 15% coming in June

  1. #11
    A friend switched to ethanol in his 502c.i. Jaguar XJS. He does 1/2 mile top speed contests. Bigger jets necessary (for alcohol) BUT a substantial increase in horsepower.
    I'm no fan of ethanol but fortunately I don't have to buy it in our area as we still have choices.

    Corn lobby is in the drivers seat.
    "Be who you are and say what you feel because those who mind don't matter and those who matter don't mind." - Dr. Seuss

    Early S Registry #235
    rgruppe #111

  2. #12
    Senior Member Arne's Avatar
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    Aug 2011
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    Eugene, OR
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    The generally available E10 has worked fine in my '84 Carrera. The fuel system is nice and clean now, so no clogging or other issues, and the Motronic system can compensate for the difference in the A/F ratio easily. Mileage is a bit less, due to fewer BTUs per gallon. But not enough less to make paying lots more for clear fuel worthwhile since it is working fine.

    (Side topic - why should clear fuel be more? Same fuel, but without the extra work and cost to add ethanol. No reason we should have to pay significantly more for fewer manufacturing steps and fewer ingredients.)

    I'm a bit more concerned with E10 (or E15, should it come to that) in the 2.4 MFI in the '72 T I have recently bought. MFI will not adjust the mixture to compensate for the BTU differences. Certainly don't need more octane or detonation resistance with a 7.5:1 comp ratio. But since all the clear gas around here is 92 octane, I suspect that's what I'll use. Unless someone can assure me that E10 won't run too lean in an MFI car.
    In transit - 1972 911T coupe, born (and someday will be again) Silver
    For sale soon - 1984 911 Carrera coupe, Chiffon white
    2016 Audi A3 e-tron (The DD)

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