regular vs premium fuel in GT

[DivineStrike]

did some quick research and he might be right. According to this http://www.mustangandfords.com/how-to/engine/mmfp-1202-ez-5-0-bolt-ons/

those mods with sticky tires is all ya really need on that little pushrod to get into the low 12's

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[thehunterooo]

This is too perfect.

Perfect for half of the threads on here lol

 

[Thed]

Premium nets you a little more power. Basically "premium" is a higher octane. The gas stations just call it premium as a marketing tactic. There's actually nothing premium about it, it just has different additives in it to raise the octane from 87 to 91 or 93, whichever is used in your area. That way they can charge you more so you'll believe that you're getting a superior product. Enough of that though. The higher octane delays combustion slightly, simply put. When the combustion is delayed, the engine knock decreases. And when engine knock decreases, you can make more power. The car will know what octane is in it through it's knock sensors. They basically measure the amount of pinging (pre-detonation) and adjust spark timing to eliminate knock.

That should basically cover it.

 

[dirty-max]

did some quick research and he might be right. According to this http://www.mustangandfords.com/how-to/engine/mmfp-1202-ez-5-0-bolt-ons/

those mods with sticky tires is all ya really need on that little pushrod to get into the low 12's

He has an axle back exhaust 2012 gt with wide tires is what he claims and he was pulling me hard one time but then the next time we raced he was slowly accelerating and passing me up

 

[ScottsGT]

I'm waiting for the summer blend fuels. I picked my car up just as the winter blends were coming out. My first few tanks MPG were higher, (well, first tank full sucked) and then the stations around here switched over.
I was getting about 21/22 average. I'm hitting 19/19.5 now. Of course there is the factor that I'm more comfortable driving it now and may not be babying it as much either.

 

[DRKHR5]

I cant vouch for the mustang yet.. but in my secondary vehicle.. 2011 FJ Cruiser V6... driving the exact same roads daily into and home from work for many of tanks of gas and experiments... I would always take a pretty significant step down in MPG's when using 87 versus 91 octane. On 91 octane I could usually push 330-345 miles out of the 19 gallon tank and whenever 87 I would have to fill up as soon as 260-280 miles to the same tank.

I would of course use the actual miles per gallon by dividing what I drove in miles by what i put in (in gallons) and then I could compare the averages.

Take roughly the high range of 87 fill-up (275 miles per 19 gallon) and take the low end of a 91 octane fill-up (330 miles to the same 19 gallon potential)... and I was running about 14.5mpg on 87 and 17.5 mpg on 91. Not scientific but almost exact comparisons.. even filling up at the same pump so it turns off the same. Same weather conditions/traffic/ and ratio of freeway to city driving.

The roughly $0.20 / gallon extra nets you plenty more efficiency to offset the extra cost.

I only fill up 91 anymore. My numbers are good enough for me. Ive done it multiple times all with same results. (and in different seasons... AZ winter vs Summer)

Just my approach to the topic.

The problem is... it is too hard to do this test in the Mustang... I cant count how many times I get on the throttle out of nowhere... and I couldn't keep that even across the fuel efficiency test. tricky tricky.

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