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    European 92 octane versus US 91 octane

    Am working with RS Tuning to determine what modifications of their DME would be required to run on US 91 octane fuel without risking detonation and engine damage. The person with whom I am working would like to run an engine dyno test using US 91 octane fuel but shipping gasoline to Germany is impractical. We believe that Euro 92 octane is equal to or lower than US 91 but RS has asked that I provide technical references, in German or English, substantiating this assumption. Anyone who might be able to help? Thanks you very much.

    Re: European 92 octane versus US 91 octane

    91 octane US = 96 octane in Germany.
    The octane number in Germany is ROZ.
    In the US, it is usual to take the middle value of ROZ and MOZ values (pump octane).

    We have three fuel qualities in Germany:
    91 octane ROZ (NORMAL BLEIFREI)
    95 octane ROZ (SUPER BLEIFREI)
    98 octane ROZ (SUPER PLUS)

    If RS-Tuning wants to adapt the DME to 91 octane US, they should adapt it to 95 octane ROZ in Germany (SUPER BLEIFREI). I can talk to them if you want me to, send me a mail. To whom did you talk? Gerhard or Reinhold?

    RC:Thanks. I'll email you.


     
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