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  #51 (permalink)  
Old Jun 11th, 2006, 11:35 PM
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snek
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Quote: Originally Posted by Chimera
I'm just curious, are those of you who are running lower octanes (particularly 87) noticing any knocking/pinging? If not...why would anyone run >=91 octane in the S if it's not needed?


MINIs have "knock sensors". Using lower octane fuel does not reduce compression, but adjusts the ignition timing which reduces power output, thereby preventing knocking. So, having to turn the key twice is worth having the full power output when I need it.
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