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Old 09-03-2013, 03:48 PM   #1
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What Octane do you use in your mustang?

I will probably be filling up with 89 octane every 3 trips, I'm still on the dealer tank,and will be filling up today,not sure what octane they used, I think they put in 87 though.
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Old 09-03-2013, 03:54 PM   #2
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I will probably be filling up with 89 octane every 3 trips, I'm still on the dealer tank,and will be filling up today,not sure what octane they used, I think they put in 87 though.
92 every time! The performance gain is worth every penny!
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Old 09-03-2013, 04:00 PM   #3
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93 only since day one. If I wanted to pinch pennies I wouldn't of bought a mustang.
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Old 09-03-2013, 04:03 PM   #4
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93 only since day one. If I wanted to pinch pennies I wouldn't of bought a mustang.
+1 Exactly!
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Old 09-03-2013, 04:07 PM   #5
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The higher the octane the better performance you will get. Run the highest octane that you can afford. Everyone's situation is different.
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Old 09-03-2013, 04:09 PM   #6
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Tuned for 93
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Old 09-03-2013, 04:15 PM   #7
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93 tuned
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Old 09-03-2013, 04:34 PM   #8
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91 is the highest you can get in California. Even though I have a 91 tune, I would still use it. If you can't afford Premium, then use what you can afford.
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Old 09-03-2013, 04:57 PM   #9
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I always run 93. I can count on one hand how many times I've run less.
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Old 09-03-2013, 05:17 PM   #10
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If I could consistently find 93 octane I would go 93, but since 91 is at all the gas stations around me thats what I go with.
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Old 09-03-2013, 05:23 PM   #11
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I'm a broke college student and I still run 91 (highest I can get in Cali)
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Old 09-03-2013, 05:25 PM   #12
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Just filled up for the 1st time since leaving the dealer, I used 89 Octane, the 93 Octane was to much for what I had on me, will use 93 in about 3 trips... It would help if the dealer had told us what Octane they filled up with.
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Old 09-03-2013, 05:26 PM   #13
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Quote:
Originally Posted by TommyV View Post
91 is the highest you can get in California. Even though I have a 91 tune, I would still use it. If you can't afford Premium, then use what you can afford.
A full tank of 91 is only like $3-4 more than a full tank of $87. It really isn't that bad.

---------- Post added at 03:26 PM ---------- Previous post was at 03:25 PM ----------

Quote:
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Just filled up for the 1st time since leaving the dealer, I used 89 Octane, the 93 Octane was to much for what I had on me, will use 93 in about 3 trips... It would help if the dealer had told us what Octane they filled up with.
I guarantee that the dealer used 87
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Old 09-03-2013, 05:29 PM   #14
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That's what I assumed. So I used 89 I can feel a slight difference,engine seems a bit louder, slightly faster acceleration, and just feels plain better.
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Old 09-03-2013, 05:41 PM   #15
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I only use 93. Since I bought it except the dealer fill up of course. It really isnt much price difference
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Old 09-03-2013, 06:46 PM   #16
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Yea the computer in the 5.0s recognizes the better octane and adjusts to it. So you will actually feel a difference.
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Old 09-03-2013, 06:52 PM   #17
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Anybody know (if) where I can find anything higher than 91 in the west Phoenix area?
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Old 09-03-2013, 06:54 PM   #18
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I've got a 91 tune in mine. We have 87,89,93 usually here. I'll run 93 down to about half a tank, then fill back up with 89, then 93 and so on. I've ran both 93 only and 89 only, and in this heat the car doesn't like to sit and idle for long periods of time with 89 alone.
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Old 09-03-2013, 07:24 PM   #19
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In my experience (Chicago area, with frequent trips to Iowa and WI) Shell tends to have 93 when most of the other stations around only have 91 or 92. Of course, it's all 10% ethanol around here....
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Old 09-03-2013, 07:47 PM   #20
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I had to fill up with citgo, no shell stations within 20 miles of me in VA, that I know of. I might use a different station next time ridiculous price for 89 and 93 compared to others
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Old 09-03-2013, 08:30 PM   #21
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I always use supreme too which I think is 93 oct .. I noticed the sign with "10% ethanol" .. Is this bad for the engine?
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Old 09-03-2013, 08:37 PM   #22
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91, 92 or 93 octane depending on which highest level the gas stations carry. Some gas stations in my area carry highest 91 and others carry 93. Just depends. Never under 91 because of tunes.
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Old 09-03-2013, 11:44 PM   #23
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Dyno tuned for 93, was also told use top tier gas,like chevron and bp,stay away from hess and walmart.
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Old 09-03-2013, 11:51 PM   #24
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Whoo 87 dollars full tank?? I run 93 octain and it take 50$ max to fill it up
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Old 09-04-2013, 07:14 AM   #25
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Quote:
Originally Posted by mustangz View Post
I will probably be filling up with 89 octane every 3 trips, I'm still on the dealer tank,and will be filling up today,not sure what octane they used, I think they put in 87 though.
Follow Ford's recommendation (premium fuel) 91 octane or higher I think would be best.

I use 93 octane only.
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Old 09-04-2013, 02:48 PM   #26
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Whoo 87 dollars full tank?? I run 93 octain and it take 50$ max to fill it up
Me too. $50-58 Never anymore than that
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Old 09-05-2013, 08:20 AM   #27
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94 octane... 91 and higher should not contain any ethanol.
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Old 09-05-2013, 08:26 AM   #28
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93+ only...I have run one tank of race fuel (104) and man did she love it
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Old 09-05-2013, 08:49 AM   #29
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94 octane... 91 and higher should not contain any ethanol.
93 here has that crap, somebody has to pay for the government subsidies to farmers. At least it's not in the drinking water yet.
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Old 09-05-2013, 10:24 AM   #30
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'tang

from what the manual said, 87 can be used. But if you install a s/c or turbo you should
have to use 91 and up. You should use 91 and up anyways imo. In the installation paperwork for my Whipple it says you have to use or it will void the warranty.
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Old 09-05-2013, 10:38 AM   #31
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I've only used 93 octane in mine.
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Old 09-05-2013, 10:49 AM   #32
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Does anyone know the performance difference between 91 and 93? Just curious.
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Old 09-05-2013, 11:00 AM   #33
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My pony has never been filled with anything but 93. But I'd bet it's an E10 blend. (Missouri doesn't require pump labeling for ethanol additive.)
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Old 09-05-2013, 11:04 AM   #34
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My pony has never been filled with anything but 93. But I'd bet it's an E10 blend. (Missouri doesn't require pump labeling for ethanol additive.)
You can bet money it is, gotta keep them corn prices high.
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Old 09-05-2013, 11:16 AM   #35
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93 always, Shell preferably. I even got the dealer to do the first fill with 93, so my 'stang has never seen anything less
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