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Old 07-15-2008, 11:47 AM
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jasonh jasonh is offline
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Join Date: Jun 2008
Location: Longmont, CO
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Default Re: Ethanol killing small engines

Originally Posted by bamabikeguy View Post
I've use the lowest, 87 octane for a long time now, in fact, it was advised I quit burning 91, because the lower octanes were the manufacturers rec...(something technical about the explosion temperature).
I have to use premium because I have a turbocharged car. The higher octane helps to prevent preignition due to higher cylinder pressure. And yes, 87 is more efficient in a normal low compression engine.
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