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Old 04-24-2015, 09:20 AM   #1
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89/93 octane

I have no tune on stock motor for now . I have been running 93 . In it everyday. Some people are saying run 89 . Since i have no tune for 93

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Old 04-24-2015, 09:25 AM   #2
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I've been running 93 with no tune since day one.
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Old 04-24-2015, 09:28 AM   #3
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You can run 89 octane just fine. It will just make a little less power.
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Old 04-24-2015, 09:45 AM   #4
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You know if we run a boss intake. If it voids anything. Since i would be ford products

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Old 04-24-2015, 09:48 AM   #5
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I think he's wondering if he can run 93 just fine without the tune or if It's better for his car to run 89 since he doesn't have the tune for 93.
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Old 04-24-2015, 10:09 AM   #6
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Originally Posted by Stang_u_14 View Post
You know if we run a boss intake. If it voids anything. Since i would be ford products
The Boss Intake equires you to run a tune.
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Old 04-24-2015, 12:21 PM   #7
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OP never said boo about boss intake..................

Anyway, I can't tell any difference at all between 87 and 93. Read HP drop is only like 7 or 13, which would be pretty hard to judge.
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Old 04-24-2015, 12:25 PM   #8
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OP never said boo about boss intake..................

Anyway, I can't tell any difference at all between 87 and 93. Read HP drop is only like 7 or 13, which would be pretty hard to judge.
Um, read post #4
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Old 04-24-2015, 12:28 PM   #9
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Originally Posted by Stang_u_14 View Post
You know if we run a boss intake. If it voids anything. Since i would be ford products
Quote:
Originally Posted by OX1 View Post
OP never said boo about boss intake..................
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Old 04-24-2015, 02:05 PM   #10
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Yea I can't tell a diff with running 87 as far as hp goes but on the highway with 87 I get better mpg. But it's all moot anyways my bama v2 will be in Monday! so back to 93 for me.


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Old 04-24-2015, 02:07 PM   #11
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Yea i tried a tank of 89 and 93 couldn't really see a difference on how the car was running.

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Old 04-24-2015, 07:13 PM   #12
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Um, read post #4
oops, my bad!!!!!!!!!!!!
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Old 04-24-2015, 07:15 PM   #13
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I didn't know if i needed a tune to be able to run 93 . Or if stock was required to run 89

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Old 04-24-2015, 09:24 PM   #14
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89/93 octane

I've put mostly 87 in and when I have put 93 in, there's no noticeable difference. It runs fine without a tune on either.


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Old 04-25-2015, 06:48 AM   #15
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I didn't know if i needed a tune to be able to run 93 . Or if stock was required to run 89

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Everything I've read is that the stock programming will push timing as far as it can all the time, so it will use the 93 the best that it can.

It just does not seem that the true benefit from 89, or even 93 is something you can feel. I may switch back to 93 in the dead of summer, as pretty much all cars get a bit more knock prone when they run hotter.
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Old 04-25-2015, 08:48 AM   #16
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I run 87. Needing that extra 10 or 15 horsepower I'd get from 93 would happen maybe once every 4 months. Mine is a daily driver and hardly ever sees any more than 1/4 throttle.
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Old 04-25-2015, 09:50 AM   #17
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I run 87. Needing that extra 10 or 15 horsepower I'd get from 93 would happen maybe once every 4 months. Mine is a daily driver and hardly ever sees any more than 1/4 throttle.
I always laugh at this. Certainly its you're vehicle so do as you please but I find it funny why people would buy a high performance vehicle that has 412 plus HP depending on year of 5.0 and then buy the lowest grade fuel.

Its funny to me that people would want to loose 10-15 HP after buying a high horsepower performance car. Clearly you keep you're 5.0 stock with no performance mods and you have amazing restraint.

I also find it funny that people who buy a high performance sports like car and drive it like Miss Daisey. You have a 5.0 and you hardley have it more than 1/4 throttle daily???? That's like buying my wife big new jugs and then having her wear baggy shirts and sweaters to hide the big jugs. 😃 Pointless!



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Old 04-25-2015, 10:00 AM   #18
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I have run 93 since my first fill up almost 16,000 miles ago no tune. It's the difference of like 3-5 bucks a tank. Not something I worry about. Seems silly to run 87 in such a great motor. Plus I think the trackey will be making a debut in the near future so I figure I should condition myself to just always keep 93 in it.
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Old 04-25-2015, 10:05 AM   #19
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We even put 93 octane in my wife's explorer.
105 in my 5.0
And diesel in my f250

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Old 04-25-2015, 11:34 AM   #20
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89/93 octane

I'm currently running a 93 tune. Does anyone know what would be the drawbacks of using 92 octane?

I ask because the gas station en route to work is 92 max. The gas stations with 93 are out of the way.
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Old 04-25-2015, 11:38 AM   #21
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89/93 octane

Let me get this right..... Some of you buy a 420 horsepower sports car with an 11.0:1 compression ratio, and want to cheap out on gas?

Ok

It's only another $2-3 total per full tank.


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Old 04-25-2015, 11:44 AM   #22
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^ I never understood that rational either. I always fill up with 93.
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Old 04-25-2015, 11:52 AM   #23
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Never understood cheaping out on lower octane either.

Trying to decipher o.p's posts =
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Old 04-25-2015, 12:13 PM   #24
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The reason for using higher octane,it lets you run more advance in the timing. since the ECM has no way of detecting the octane and can not advance the timing on it's own. There is no advantage to using higher octane with the stock tune. The engine HP is rated with the 89 tune. I use a 91 octane tune, and 91 octane fuel. when I go to the tract I change to the 93 tune and run 93 fuel.
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Old 04-25-2015, 12:17 PM   #25
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^ THE COYOTES are rated from the factory on premium fuel. Which is 93

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Old 04-25-2015, 12:17 PM   #26
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Originally Posted by Soccerluvr4 View Post
Let me get this right..... Some of you buy a 420 horsepower sports car with an 11.0:1 compression ratio, and want to cheap out on gas?

Ok

It's only another $2-3 total per full tank.


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My thoughts exactly sir!

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Old 04-25-2015, 12:40 PM   #27
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^ THE COYOTES are rated from the factory on premium fuel. Which is 93
My mistake on tested octane
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Old 04-25-2015, 12:51 PM   #28
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These newer mustangs, 5.0 & 3.7 can advance timing on the stock tune. I use an 87 octane tune SCT and 89 octane fuel as the car performs better in my opinion, or seat of the pants and ears.
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Old 04-25-2015, 01:38 PM   #29
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I always laugh at this. ....... 😃 Pointless!

Have a great day!
I always laugh at this. You seriously think you're going to be using all 412/420 horsepower every single time you crank up your car and drive anywhere.

I put a tank of 93 in it and ran it hard and did not feel a difference. It smokes the tires through 1st and a good ways in second regardless.

If I decide to get a tune, I will run 93 in it then. For now, it does just fine on 87.

And finally, I have heard about problems with the tanks at the gas stations pumping stale 93 but since everyone runs 87, there exists hardly a chance to get stale 87, not the real reason I don't run 93 but just thought I'd bring it up anyway.

Peace, bro.
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Old 04-25-2015, 01:39 PM   #30
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These newer mustangs, 5.0 & 3.7 can advance timing on the stock tune. I use an 87 octane tune SCT and 89 octane fuel as the car performs better in my opinion, or seat of the pants and ears.
If you're 5.0 performs better on 89 octane with a 87 tune over your 93 octane tune you better have the 93 tune re made ASAP! No clue on what tuning company you use but someone needs to send another 93 tune out to you.

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Old 04-25-2015, 01:40 PM   #31
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It is flat out ignorant to run 87.
But it's ok just go buy a prius.

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Old 04-25-2015, 01:41 PM   #32
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The reason for using higher octane,it lets you run more advance in the timing. since the ECM has no way of detecting the octane and can not advance the timing on it's own. There is no advantage to using higher octane with the stock tune. The engine HP is rated with the 89 tune. I use a 91 octane tune, and 91 octane fuel. when I go to the tract I change to the 93 tune and run 93 fuel.

Also, the car adjusts using knock sensors and will advance the timing to gain peak performance (stock tune peak that is).
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Old 04-25-2015, 01:47 PM   #33
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This is my first Ford product since I was 22 years old. I did not realize I needed to stop by the Egomaniacs'R'Us store and pick up a new personality along with the purchase. I guess my GM buddies were correct all along, the Mustang guys really are a bunch of jerks. Anyone want to trade a nice '14 Camaro SS for my '14 GT? I don't want to be associated with the Ford gang.
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Old 04-25-2015, 01:53 PM   #34
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This is my first Ford product since I was 22 years old. I did not realize I needed to stop by the Egomaniacs'R'Us store and pick up a new personality along with the purchase. I guess my GM buddies were correct all along, the Mustang guys really are a bunch of jerks. Anyone want to trade a nice '14 Camaro SS for my '14 GT? I don't want to be associated with the Ford gang.

What got you all bent out of shape all of the sudden?
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Old 04-25-2015, 01:54 PM   #35
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This is my first Ford product since I was 22 years old. I did not realize I needed to stop by the Egomaniacs'R'Us store and pick up a new personality along with the purchase. I guess my GM buddies were correct all along, the Mustang guys really are a bunch of jerks. Anyone want to trade a nice '14 Camaro SS for my '14 GT? I don't want to be associated with the Ford gang.
You don't want a slower car.

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