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Fuel Octane

 
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Old Jul 23, 2009
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Fuel Octane
My 91 Civic DX recommends using premium fuel ... ! (91 octane) ..... ! any thoughts?
Old Jul 23, 2009
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Re: Fuel Octane
Use the recommended fuel octane otherwise you risk knock in the engine which will over time damage it. You also lose efficiency of the engine.
Old Jul 24, 2009
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Re: Fuel Octane
what engine you runnin? stock d's dont need 91 so i dunno why it would say that. tbohar is right also though. knock = death
Old Jul 24, 2009
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Re: Fuel Octane
D15b2 (I think) ... It's just a plain stock 91 Civic DX Hatch (Canada) Owner's Manual has been with the car since new... I was surprised when I read that too. It says use 91 octane or higher!
Old Jul 24, 2009
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Re: Fuel Octane
Strange, maybe the older D series engines called for higher octane fuel... hmmmmm.
Old Jul 24, 2009
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Re: Fuel Octane
use whatever the manual says.
 
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