Making the change...87 to 93
07-25-2010, 07:24 PM
#11
4th Gear Member
Join Date: Mar 2006
Location:
Posts: 1,470
The ECU in the 2010 Mustang is more sophisticated than the unit in the 05-09 models, and it gives the midrange torque a little boost with 93 octane according to Ford's head drivetrain engineer. But peak power does not increase.
07-25-2010, 08:30 PM
#12
2nd Gear Member
Thread Starter
Join Date: Jan 2009
Location: Nj
Posts: 469
This....I know the 2010 om says that it will benefit from 93, but if its really not worth it I appreciate the input I'll stick to 87.
07-25-2010, 09:24 PM
#13
2nd Gear Member
Join Date: Dec 2006
Location: Ohio
Posts: 166
Best advice is to try it and see what you think. Nothing really lost on a couple tank fulls. $0.20/gallon x 13 gal is only $2.60 extra. If you don't notice any power difference or fuel economy increase, then go back to 87. Just my $0.02.
07-25-2010, 09:55 PM
#15
6th Gear Member
07-26-2010, 02:11 AM
#19
6th Gear Member
Join Date: Apr 2005
Location: West Los Angeles
Posts: 5,390
The Bullitt tune, with its ability to adapt to gas of different octanes, is going to screw up the whole "advice" given here! Prior to 2010 we've been telling everyone that just switching to a higher octane is a waste of $$$... Not with the new GTs.
Here in L.A. we don't have 93, just 91, so I can't see spending $.20 extra per gallon, unless I was racing and needed every possible advantage.
What I would like to know is if switching to a higher octane gas has given better MPG, performance, etc, and has anyone got data to back those claims up?
Here in L.A. we don't have 93, just 91, so I can't see spending $.20 extra per gallon, unless I was racing and needed every possible advantage.
What I would like to know is if switching to a higher octane gas has given better MPG, performance, etc, and has anyone got data to back those claims up?
07-26-2010, 07:12 AM
#20
1st Gear Member
Join Date: Jan 2010
Location: Brandon, Florida
Posts: 90
I have a 91 tune on mine, kinda hard to find 91 around Tampa. But sometimes I use 93, but mostly 87. No ping and I really don't know much of a difference. So for the most part with the 91 tune what should I be using??? As far as I know higher octane does not give you any more horsepower. It's a knock rating. Fuel is not like fuel when I firs started driving. Leaded regular was 93, and you can go as high as 102 right from the pump. It was called Sunoco 280. I guess I'm showing my age. I use to say, I'm not putting in that hi-test as we called it. It's 43 cents, too much. I'll stick with the regular for 29 cents. LOL