FordExcursions.com Forums
steve holtyn
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• seattle, WA, USA |
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• Registered on 3/21/2003 |
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• 29 posts |
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 Posted:8/5/2003 22:12 |
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is there a correct octane ive been putting the most highest octane there is at the gas stations hopefully its good for this motor . |
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birdman127
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• baltimore, MD, USA |
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• Registered on 10/13/2002 |
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• 581 posts |
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Posted:8/6/2003 08:06 |
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| Quote: | | is there a correct octane ive been putting the most highest octane there is at the gas stations hopefully its good for this motor . |
87 is fine!
Moderator
Scott
2000 ltd 6.8 V10*4.30LS*
Lots of mods
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Jon R
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• manchester, NH, USA |
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• Registered on 1/29/2003 |
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• 17 posts |
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Posted:8/6/2003 11:42 |
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in the owners manual, it says NOT to use anything higher than 87 octane  |
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Wheels
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• Visalia, CA, USA |
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• Registered on 1/20/2003 |
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• 214 posts |
• 1
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Posted:8/6/2003 13:33 |
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I have been using 87 since we have had ours, but recently got a little knock. Switched to 89 and knock went away. Going to try a different station with 87. |
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LANDYOT
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• Subscriber since 11/23/2003 |
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• Newport News, VA, USA |
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• Registered on 7/15/2003 |
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• 1,110 posts |
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Posted:8/6/2003 15:05 |
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Using higher octane gasoline is not good for your engine ... unless you're getting a knock with your current gasoline. But then, I'd look for another supplier (I've had the worst luck with Exxon gas).
Higher octane fuel has a higher flash point. Meaning, it takes a little more "umph" to ignite, and more importantly, to completely burn all of the fuel in any given cylinder. This is why higher octane helps avoid predetonation ... avoids igniting before it's supposed to. In some engines, the carbon build-up gets so bad that it will start to glow ... and in turn causes the fuel to ignite prematurely, which in turn causes the knocking. By using octane of a rating higher than specified, you're actually contributing to the problem because an engine designed for 87 octane cannot completely and/or efficiently burn off all the 93 octane (or higher) fuel, and hence will add to the carbon build-up problem.
Stay with 87 octane (and even a lower octane number in high-elevation areas). |
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Wheels
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• Visalia, CA, USA |
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• Registered on 1/20/2003 |
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• 214 posts |
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Posted:8/6/2003 16:37 |
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thanks for the info |
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