87 on my 2010, i keep telling myself i am going to jump up to 93 for the summer but everytime i get to the gas station i dont really see the point. i cant imagine it would make that much of a difference in daily driving. if it does someone correct me.

 

If you're not "tuned" to a higher octane, don't worry about it. Run regular and you'll be fine.

 

The car will adjust ignition and retard the timing for higher octane levels.

I'll be running 93, I'm conditioned to it for running a turbo car for almost 3 years, so the price doesn't even phase me. $1.20 per fill up, not a huge deal. Costs me $60/year extra for fun, I won't complain.

 

No 91 here either. So it'll be either 87 or 93. I think the middle one here is 89. Can't remember for sure.

 

You're forgetting the 4.6 in the '10 is like 08/09 Bullitt. The Adaptive Spark Ignition senses the octane and will add 10 lb ft of lower range torque on 91 premium over 87 regular according to Ford press releases. Its not a big difference but I can feel a quicker response with the butt meter. See your Manual:

Octane recommendations (Bullitt™* Mustang only)

Your vehicle will run normally on 87 octane regular fuel without
damaging the engine, but premium fuel with an octane rating of 91
(R+M)/2 or higher is recommended for best overall performance.

* ™ &
Warner Bros. Entertainment Inc. (s07)



Press Release: Engine performance is further enhanced through the use of an innovative adaptive spark ignition system, new for the 2008 Mustang Bullitt.
The system can sense, within a few seconds, what type of fuel is being injected into the motor and adjusts the spark to provide maximum torque at any given speed – and as much as 10 pounds-feet more between 1,000 and 4,000 rpm.
Bullitt can run on either premium or regular fuel. Ford recommends premium fuel for optimum performance, but the adaptive spark ignition will adjust the spark to burn regular fuel without damaging the engine.

 

Advances the timing for higher octane...

 

In my 2010, every tank (minus when the dealer filled it up) has been on 93 octane. More efficient for the engine and as Charlie said, it adds to the mid-range torque. But now that I have some engine mods and a tune, I reap more of the benefits.

There was a previous thread started about it a while back- See here: https://themustangsource.com/showthread.php?t=478748 for anyone seeking some more input.

 

I'm surprised you guys don't have that many gas stations selling 94 octane. Here we get supplied by Petro Canada, they're the only ones selling 94, ain't cheap though. I will start out with 91 and drive it for a while, then i'll switch to 94 to see the difference.

 

Here we go again, i taught i could sell my timing light after parting out with the '69.

 

I was once told I needed to retard my timing so I bought a digital watch. . .

 

I'm Blown so my tune is set to 93oct.

Its 2.99~3.05 average here in S.FL MIA

 

Durrr...still used to talking about turbo motors! Thanks for correcting me.

 

Ditto that. Believe it or not, I went about 8 months very happy with 87.

Once I tried 93, that BrenSpeed tune felt like I added a turbo.

I will be running 93 on my '11 from day one.

 

Even if you dont run a custom tune, using premium fuel just makes your car run better. Btw, I recommend Shell V-Power. I was a Sunoco fan, but V-Power seems to burn better (???) .

 

Walt, would love a link to your SVO project. I had a bright red 86 in the past. I would love to find one, but only 9,844 (I think) made..... I did see one outside of Pittsburgh last Saturday night. Easily the best looking Fox Mustang.

 

Some of you have 87 and 93 available in the same town? I've always lived in places where the lowest and highest available were separated by 4 points...so 87-91, or 89-93, but never 87-93.

 

We have Regular 87, Plus 89 and Premium 93 at most stations.

 

I don't have an SVO blog, but lets just say that it's a true labor of love and a huge money pit. Right now everything is on hold for financial reasons, but I have no intentions of abandoning the restoration.

Btw, It uses 91 octane.

 

Mine back in 1989. Really loved that car.

Sorry to hijack this thread.

 

Very cool.