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How low to go before changing octane?

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Old Nov 19, 2007 | 05:31 PM
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Favre's Avatar
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From: San Diego
How low to go before changing octane?

So I want to start running 91 octane with my edge programmer.....

Im doing 87 Octane right now, how low do i let it go until its safe to fill up?

Im at under 1/8 of a tank now, and under 50 miles remaining, should i go to 15mi left before filling up?
 
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Old Nov 19, 2007 | 05:46 PM
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From: Algonquin Il
Here is a thread dedicated to just that

https://www.f150online.com/forums/sh...d.php?t=307253
 
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Old Nov 19, 2007 | 05:57 PM
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From: Long Island, NY
Originally Posted by Favre
So I want to start running 91 octane with my edge programmer.....

Im doing 87 Octane right now, how low do i let it go until its safe to fill up?

Im at under 1/8 of a tank now, and under 50 miles remaining, should i go to 15mi left before filling up?
I switched at 1/4 tank with no problem many times.
 
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Old Nov 19, 2007 | 06:01 PM
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Originally Posted by 05supercrew
I switched at 1/4 tank with no problem many times.
Don't try that with yer new tuner!
 
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