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Old 03-28-2006, 04:19 PM   #1
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ok now i have heard so many rumors about octane, some about how its only purpose is to prevent knock and has no effect on perfomance. So I have to ask, would putting a higher octane fuel or even racing fuel in an LN3 have any sort of effect, or is that only for */Ced engines?
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Old 03-28-2006, 04:22 PM   #2
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Yes, higher octane fuel will show minor gains in almost any application.
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Old 03-28-2006, 04:23 PM   #3
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However it is most noticable in the SC motors. I never noticed a difference in my 5.3L truck. Not a bit...mileage wasn't enough of a difference to see.
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Old 03-28-2006, 04:24 PM   #4
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ok i have also heard that a higher octane fuel will cause you to get better gas mileage, now IS THAT TRUE???
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Old 03-28-2006, 04:27 PM   #5
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I seem to get less gas mileage with higher octane
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Old 03-28-2006, 04:29 PM   #6
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Most will see a slight improvement. Some have a foot issue that gets worse with higher octane. See John'* (Mos95b) post. lol
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Old 03-28-2006, 04:31 PM   #7
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Quote:
Originally Posted by MOS95B
I seem to get less gas mileage with higher octane
any specific brand of gasoline or just in general?
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Old 03-28-2006, 04:42 PM   #8
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so the basic answer to this post is ....

YES for */C

NO for N/A stick to 87-89 octane
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Old 03-28-2006, 04:59 PM   #9
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Quote:
Originally Posted by wjcollier07
so the basic answer to this post is ....

YES for */C

NO for N/A stick to 87-89 octane
what about SC running 87-89??
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Old 03-28-2006, 05:06 PM   #10
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Quote:
Originally Posted by wjcollier07
so the basic answer to this post is ....

YES for */C

NO for N/A stick to 87-89 octane
I have run 89 in my 91 and as well 93... The 89 seemd to do just as much for the LN3 in my car as the 93 so I decided to not waste the extra couple bucks... I run 87 all of the time now...

I run 87 in my 95 as well...

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