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Old 07-23-2014, 01:37 AM   #41
Badness
 
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Says premium on the Ford web site.
http://www.ford.com/cars/mustang/spe...140723053442:s
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Old 07-23-2014, 05:06 PM   #42
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It doesn't say that it HAS to be used.
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Old 07-23-2014, 06:10 PM   #43
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very interesting thread. My main interest is the difference the octane rating may have on engine wear. Is one easier on a motor than the other?

Another question:

Is there are difference in running BP/Shell/Exxon? Or are the additives basically the same.

I remember in the Manual for my 2010 GT it recomended BP gas and so that is all I ever put in the car.
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Old 07-23-2014, 08:11 PM   #44
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Originally Posted by SirDrums View Post
very interesting thread. My main interest is the difference the octane rating may have on engine wear. Is one easier on a motor than the other?

Another question:

Is there are difference in running BP/Shell/Exxon? Or are the additives basically the same.

I remember in the Manual for my 2010 GT it recomended BP gas and so that is all I ever put in the car.
Just stick with top tier companies. Just because you buy gas at Brand X station doesn't mean you are getting Brand X fuel. But you are much more likely to get a quality product (as well as the top tier additives) when you stop at a reputable place.

Best chance to extend the life of the engine? My recommendation would be to purchase the recommended octane.
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Old 07-23-2014, 08:14 PM   #45
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Quote:
Originally Posted by scottmach View Post
It doesn't say that it HAS to be used.
You won't get peak performance by being cheap on the fuel.
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Old 07-23-2014, 10:53 PM   #46
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Originally Posted by cruisin5268d View Post
Just stick with top tier companies. Just because you buy gas at Brand X station doesn't mean you are getting Brand X fuel. But you are much more likely to get a quality product (as well as the top tier additives) when you stop at a reputable place.

Best chance to extend the life of the engine? My recommendation would be to purchase the recommended octane.
And that brings us full circle. Running 87, 89, 91, 93...all the same regarding safety. The engine/computer adjusts. Best performance...93. If you can find ethanol-free 93 octane, you'll get better performance and mileage. We are talking 10 HP difference between 89 and 93, btw.
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Old 07-24-2014, 06:26 PM   #47
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Originally Posted by cruisin5268d View Post
You won't get peak performance by being cheap on the fuel.
I agree and with my mods 93+ octane is an absolute necessity. But that's not the argument.
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Old 07-24-2014, 06:27 PM   #48
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I remember in the Manual for my 2010 GT it recomended BP gas and so that is all I ever put in the car.
Well why do you think Ford would recommend BP gas LOL?
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Old 07-25-2014, 01:49 PM   #49
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My gas cap says it recommends BP gas so I only put Shell in it.
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Old 07-26-2014, 10:40 AM   #50
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Best chance to extend the life of the engine? My recommendation would be to purchase the recommended octane.
Purchasing 93 to 87 octane is recommended.

As far as what to avoid in a 2014 Mustang according to Ford, do not use:
• Fuels containing more than 15% ethanol or E-85 fuel.
• Fuels containing methanol.
• Fuels containing metallic based additives, including manganese-based compounds.
• Fuels containing the octane booster additive, methylcyclopentadienyl manganese tricarbonyl (MMT).

From Page 157 of the 2014 Mustang Owner's Manual (3rd Edition) for the 5.0L V8 engine - "Regular unleaded gasoline with a pump (R+M)/2 octane rating of 87 is recommended. Some stations offer fuels posted as “Regular” with an octane rating below 87, particularly in high altitude areas. Fuels with octane levels below 87 are not recommended. Do not use fuels with octane posted on pump below 87. Premium fuel will provide improved performance."

My recommendation to extend the life of the engine, although off topic, would be to run your engine oil about 30 degrees cooler. The cheaper of two Ford made oil coolers is about $139, fits the recent Boss and 11-14 GT's. And is, did you know, standard on all '15 GT's. Can be easily bought from Ford or places like American Muscle.
http://www.americanmuscle.com/frpp-b...ntV1&year=2014

Last edited by GTC; 07-26-2014 at 10:52 AM.
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