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Author Topic: Mazda RX-8 octane Topic is locked Back to Topics
fyman
Rookie Author
Virginia Beach

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Message Posted: Dec 9, 2008 12:34:37 PM
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I have been forced to change to 87 octane from 93 due to the high prices of gas.... any one have any experience of performance problems or massive decrease in MPG by using 87 octane?

Thanks in advance for you advice;

Tony G
Gloucester, Va
2005 Winning Blue Touring Edition RX-8
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phippi409
Sophomore Author Quad Cities

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Message Posted: Oct 3, 2009 12:47:32 PM
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Littleyellowman is right. Check to see what the owner's manual says the minimum required octane is. This is different than what the recommended octane is. I would never put a lower octane fuel than what the owner's manual requires for any car. Not only is it bad for your engine, but it will throw your warranty right out the window as well. Bite the bullet and pay for the higher gas, or you may be paying for a new engine.
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littleyellowman
Champion Author Hamilton

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Message Posted: May 25, 2009 12:52:46 AM
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Just too be safe i would check ur owners manual to see if changing to a lower octane fuel will harm ur engine!!
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Etop
Champion Author Pennsylvania

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Message Posted: Dec 13, 2008 8:09:06 PM
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All I can say is, I switched to 87 in my CX-7 with the turbo and everything is great. No loss of power and a slight increase in milage.
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