What fuel for new GT?
10-04-2014, 12:15 PM
#11
4th Gear Member
Join Date: Mar 2014
Location: Austin, Texas
Posts: 1,155
Says who? Owners manuals are available for free all over the internet.
On this forum I did a search for "What octane" and it returned 494 threads on the topic. There's thousands of such threads across the internet about what fuel / octane to use.
On this forum I did a search for "What octane" and it returned 494 threads on the topic. There's thousands of such threads across the internet about what fuel / octane to use.
10-04-2014, 01:43 PM
#12
You can use 87 octane in the 2011+ Mustang GTs. I use 87 octane everyday. You lose BHP, you only get around 400-405BHP on 87 octane, but if you go to 91 octane, you get the full 412 advertised BHP.
The way it works is in Ford's Copperhead PCM. The PCM reads from the knock sensors on the Coyote block and switches to a less spark advanced firing table (or set of tables). If you go to a higher octane, the PCM senses no knock and switches to a higher advanced spark firing table (or set of tables).
NOTE: The stock Copperhead PCM tuning tables can only go up to 91 octane max. If you find 93 octane, you only get 412BHP from the 91 octane tune tables.
The only way to take advantage of 93 octane or higher rated fuels is to order a tune from BAMA, Brenspeed, Steeda, etc.
The way it works is in Ford's Copperhead PCM. The PCM reads from the knock sensors on the Coyote block and switches to a less spark advanced firing table (or set of tables). If you go to a higher octane, the PCM senses no knock and switches to a higher advanced spark firing table (or set of tables).
NOTE: The stock Copperhead PCM tuning tables can only go up to 91 octane max. If you find 93 octane, you only get 412BHP from the 91 octane tune tables.
The only way to take advantage of 93 octane or higher rated fuels is to order a tune from BAMA, Brenspeed, Steeda, etc.
10-04-2014, 02:21 PM
#13
4th Gear Member
Join Date: Jul 2011
Location: Michigan
Posts: 1,329
10-05-2014, 08:00 AM
#14
Here's your answer (Jim gave a good explanation behind the numbers):
Horsepower
412 hp @ 6,500 rpm, 91 octane
402 hp @ 6,500 rpm, 87 octane
Torque
390 lb-ft @ 4,250 rpm, 91 octane
377 lb-ft @ 4,250 rpm, 87 octane
Horsepower
412 hp @ 6,500 rpm, 91 octane
402 hp @ 6,500 rpm, 87 octane
Torque
390 lb-ft @ 4,250 rpm, 91 octane
377 lb-ft @ 4,250 rpm, 87 octane
10-05-2014, 03:29 PM
#15
1st Gear Member
Thread Starter
Join Date: Oct 2013
Location: Florida
Posts: 56
You can use 87 octane in the 2011+ Mustang GTs. I use 87 octane everyday. You lose BHP, you only get around 400-405BHP on 87 octane, but if you go to 91 octane, you get the full 412 advertised BHP.
The way it works is in Ford's Copperhead PCM. The PCM reads from the knock sensors on the Coyote block and switches to a less spark advanced firing table (or set of tables). If you go to a higher octane, the PCM senses no knock and switches to a higher advanced spark firing table (or set of tables).
NOTE: The stock Copperhead PCM tuning tables can only go up to 91 octane max. If you find 93 octane, you only get 412BHP from the 91 octane tune tables.
The only way to take advantage of 93 octane or higher rated fuels is to order a tune from BAMA, Brenspeed, Steeda, etc.
The way it works is in Ford's Copperhead PCM. The PCM reads from the knock sensors on the Coyote block and switches to a less spark advanced firing table (or set of tables). If you go to a higher octane, the PCM senses no knock and switches to a higher advanced spark firing table (or set of tables).
NOTE: The stock Copperhead PCM tuning tables can only go up to 91 octane max. If you find 93 octane, you only get 412BHP from the 91 octane tune tables.
The only way to take advantage of 93 octane or higher rated fuels is to order a tune from BAMA, Brenspeed, Steeda, etc.
It was kinda the same way my tuner dynotuned my 5.3 Colorado. It would run stronger on 91+ and run fine on 87.
10-07-2014, 08:06 PM
#17
4th Gear Member
Join Date: Jul 2011
Location: Michigan
Posts: 1,329
this has been beaten to death. if you want rated power from your engine, run premium. you won't harm your car at all running regular.
10-26-2014, 09:05 AM
#18
Join Date: Oct 2014
Location: Chesapeake, VA
Posts: 40
Yes, regular is fine just try to use gas from a top tier gas station (toptiergas.com). I usually use costco regular which is on the top tier list but I notice slightly smoother response with shell regular. I don't know if shell puts better detergents in their gas or something but I personally notice a slightly better feel. I have a costco membership so that's where I tend to go the majority of the time.
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