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View Poll Results: What grade Octane gasoline do you use?
87 14 31.11%
89 10 22.22%
91 5 11.11%
93 14 31.11%
95 3 6.67%
Diesel 1 2.22%
E-85 0 0%
Other 4 8.89%
Multiple Choice Poll. Voters: 45. You may not vote on this poll

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  #25  
Old 08-04-2009, 06:53 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

using 87 on my 3.7. Shall try the 93 on an empty tank.

Will the change affect the engine in the long run? If so, negative or positive.
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  #26  
Old 08-04-2009, 07:00 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

I always use 87, but have used 89 and 93 a couple of times in the past.

I wonder if any harm can be caused by using a higher octane on vehicles that only call for regular. I kind of want to try using a higher octane on my next fill up to see if I notice any big differences.
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  #27  
Old 08-04-2009, 07:01 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

Anyone able to find ethanol-free gas where they are?

There is a convenience store right next to my subdivision and they have ethanol-free gas. I can definitely tell a difference when I fill up with 93 as compared to when I fill up at a station that has "up to 10% ethanol".
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  #28  
Old 08-04-2009, 07:04 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

I voted 87 for summer and 89 for winter!

(I didnt realize you could vote for more than one so I manually added it)
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  #29  
Old 08-04-2009, 07:07 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

Quote:
Originally Posted by LO.7 View Post
I wonder if any harm can be caused by using a higher octane on vehicles that only call for regular. I kind of want to try using a higher octane on my next fill up to see if I notice any big differences.
X2, anyone have an answer to this?
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  #30  
Old 08-04-2009, 07:11 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

I don't think it will harm it.... some engines just won't perform any better with higher octane fuel.

The 3.5L HO in my Intrepid R/T ran about the same on 89 as it did on 93.
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  #31  
Old 08-04-2009, 07:21 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

All right, next time i'm on E, time to put ninety-three

lol i rhymed
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  #32  
Old 08-04-2009, 07:21 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

5.7L HEMI

93 Octane because I am CMR tuned.
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  #33  
Old 08-04-2009, 08:07 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

87 for my 3.5L V6. I used 93 but found that there wasn't a change in performance so I bumped back down to 87.
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  #34  
Old 08-04-2009, 08:15 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

Interesting thread..

89, 91 and Other. HEMI

89 b/c that's what the manual calls for
91 b/c sometimes I go to the track and I see consistent times with the Diablo 91 tune.
Other b/c sometimes at the track I can't pass up a few gallons of the 100 octane @ $6.79/gal
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  #35  
Old 08-04-2009, 08:22 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

93 octane for the 6.1L HEMI
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  #36  
Old 08-04-2009, 08:28 PM
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Re: What grade of gasoline octane do you use & Why? Also state what size motor?

I only use 87 in my 4.7. It's what Jeep calls for, it's what I use and have no problems with.
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