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Octane of fuel recommended for 330HP 454...

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Old 04-12-2009, 08:42 PM
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Default Octane of fuel recommended for 330HP 454...

What octane fuel are you guys running in stock 330hp 454s.

Thanks.
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Old 04-12-2009, 09:43 PM
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89 should be OK
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Old 04-12-2009, 09:47 PM
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Originally Posted by SmurfOnAGixxer View Post
What octane fuel are you guys running in stock 330hp 454s.

Thanks.
87 should be just fine also. My 496ho's only require 87.
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Old 04-12-2009, 10:51 PM
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87 is the minimum but 89 should give you slightly better performance and is better for the motor all together.
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Old 04-13-2009, 03:25 AM
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87 octane is minimum and running any higher octane is waste of money and will possibly hurt performance and for sure will not help performance.
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Old 04-13-2009, 07:22 AM
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87 octane is minimum and running any higher octane is waste of money and will possibly hurt performance and for sure will not help performance.
Agree
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Old 04-13-2009, 12:44 PM
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87 octane is minimum and running any higher octane is waste of money and will possibly hurt performance and for sure will not help performance.
Will 93 octane hurt a 454 Mag EFI, Griff?
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Old 04-13-2009, 01:38 PM
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87.
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Old 04-13-2009, 03:23 PM
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Will 93 octane hurt a 454 Mag EFI, Griff?
It won't actually hurt it, but it will make your transom more black. The higher octanes won't burn as completely on an engine designed to run 87. 87 will burn the most completely and make the most power.
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Old 04-13-2009, 03:54 PM
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It won't actually hurt it, but it will make your transom more black. The higher octanes won't burn as completely on an engine designed to run 87. 87 will burn the most completely and make the most power.
This is true. I have seen a 525 boat that used 93 octane and that transom was covered in soot!
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