Question concerning 2011 GT Octane
08-29-2010, 08:02 PM
#1
2nd Gear Member
Thread Starter
Join Date: Feb 2007
Location: Richmond Va.
Posts: 222
Question concerning 2011 GT Octane
I read where Ford says you can run on 87 octane, but recommends 91 or higher. In my local area, all we have are 87,89,93. There is a BIG jump in cost from 89 to 93 of course. Should I just run the 87 octane, 93, mix it up, or will 89 be sufficent? Is there any adverse effects to running the 89?
08-29-2010, 08:07 PM
#2
6th Gear Member
Obviously the 5.0 can adjust timing to suit the octane, similiar to the Bullitt tune, although the gains from the higher octane are actually minimal without a custom tune for it. You can run any octane, 87 on up, safely.
08-30-2010, 06:11 AM
#5
2nd Gear Member
Join Date: Apr 2010
Location: Kansas
Posts: 240
My 2010 Premium GT/Automatic just ran 14.2158 @ 98.49 on regular 87 octane gas on a greasy 95F track with stock tires, stock tune just this Saturday. Nary a ping or hickup and not bad performance.
Also, I might add that it was my 1st time on a track, I'm 57 years old and I wasn't getting the torque converter wound up right for a good launch. My reaction time of .1516 surprised me. Not bad for an old guy!
Also, I might add that it was my 1st time on a track, I'm 57 years old and I wasn't getting the torque converter wound up right for a good launch. My reaction time of .1516 surprised me. Not bad for an old guy!
Last edited by jhawkr; 08-30-2010 at 07:26 AM. Reason: To add
08-30-2010, 10:05 PM
#6
1st Gear Member
Join Date: Jun 2008
Location: Midwest
Posts: 125
It is recommended to use the octane recommended for the engine as specified by the manufacturer. Many would think think that if 87 octane is good in my engine, then 93 octane is my engine has to work better, when really it does not.
Many had make claims suggesting that we should use higher octane gas stating that the higher octane fuels received chemical additives to clean fuel injectors. In todays' fuels, these additives are found up and down the octane ladder.
I do understand that higher octane fuel may be required when a "tuner" remaps fuel delivery and timing tables, but in a stock engine, I use the fuel octane recommended. In my case, my '05 GT uses 87 octane and that's what I burn.
I was not aware that engine management systems could adjust upward and downward in compensation of fuel octanes. The only engine timing changes I was aware of references the engine management's ability to subtract or retard engine timing when the knock sensor(s) detected engine fuel knock.
Many had make claims suggesting that we should use higher octane gas stating that the higher octane fuels received chemical additives to clean fuel injectors. In todays' fuels, these additives are found up and down the octane ladder.
I do understand that higher octane fuel may be required when a "tuner" remaps fuel delivery and timing tables, but in a stock engine, I use the fuel octane recommended. In my case, my '05 GT uses 87 octane and that's what I burn.
I was not aware that engine management systems could adjust upward and downward in compensation of fuel octanes. The only engine timing changes I was aware of references the engine management's ability to subtract or retard engine timing when the knock sensor(s) detected engine fuel knock.
08-30-2010, 10:59 PM
#7
Another thing the Coyote's ECU has at its disposal is the variable cams. So advancing and retarding the cams independently in addition to advancing and retarding the spark, the Coyote is rather versatile for adjusting for fuel (octane count).
08-31-2010, 01:02 PM
#10
1st Gear Member
Join Date: Jun 2010
Location: Sc
Posts: 74
My 2010 Premium GT/Automatic just ran 14.2158 @ 98.49 on regular 87 octane gas on a greasy 95F track with stock tires, stock tune just this Saturday. Nary a ping or hickup and not bad performance.
Also, I might add that it was my 1st time on a track, I'm 57 years old and I wasn't getting the torque converter wound up right for a good launch. My reaction time of .1516 surprised me. Not bad for an old guy!
Also, I might add that it was my 1st time on a track, I'm 57 years old and I wasn't getting the torque converter wound up right for a good launch. My reaction time of .1516 surprised me. Not bad for an old guy!