What Octane Fuel?

[jmhtang]

First-time Mustang owner here. The online owner's manual recommends 87 Octane fuel for the EB and V6 engines. The V8 (which should be arriving shortly:clap2 is not mentioned in the manual.
So my question is: What octane are you GT owners using?

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[opensesame]

First-time Mustang owner here. The online owner's manual recommends 87 Octane fuel for the EB and V6 engines. The V8 (which should be arriving shortly:clap2 is not mentioned in the manual.
So my question is: What octane are you GT owners using?

Both Ecoboost and V8 requires 87 Octane, but premium fuel is recommended. Use 93/94 Octane for maximum performance.

 

[Asharus]

i WANT to use 87, but i put 93 in.

 

[phil1336]

The EB 2.3 I4 recommends Premium Fuel. The 3.7 V6 simply recommends Regular Fuel. If you have the V6, 87 Octane is fine.

 

[jmhtang]

Both Ecoboost and V8 requires 87 Octane, but premium fuel is recommended. Use 93/94 Octane for maximum performance.

Define maximum performance. I know it's not MPG. What performance parameters do you mean? Thanks.

 

[jmhtang]

OOOPS! My bad. I misread the manual. It recommends 87 Octane for all 3 engines. Sorry, guys.

 

[TurboAg]

Define maximum performance. I know it's not MPG. What performance parameters do you mean? Thanks.

Horsepower and torque

MPG also improves slightly with higher octane fuel...all things equal

 

[kulfyur]

I use non-ethanol 93.

Better performance, better fuel economy, and healthier for the engine from what I understand.

And if you want to find non-ethanol gas in your area, download the app "Pure Gas". (Its better to call the location first to verify as i've learned it's not always the most accurate)

 

[DBCooper]

Dude, do a search. How many times do we have to answer (and rehash) the same questions?

 

[89Trooper]

I'm not racing... 87 is what is recommended, and is fine.

(Mustang GT)

 

[jmhtang]

Dude, do a search. How many times do we have to answer (and rehash) the same questions?

Dude, I did an "octane" and a "fuel" search. Looked at the first 3 pages and did not see those words in the thread subject, or if I did, the thing I was interested in was not addressed.

I've been on many forums and always search before initiating a thread. Sorry I bothered you.
Happy New Year.

 

[Spartan]

87 is fine for all 3 engines (V6, EB, GT).

The EPA tested the MPG using 87 octane.

Using 87:
The V6 takes no HP hit.
The EB takes about a 29-30'ish HP hit (something like 13% loss of HP).
The GT takes about a 1% HP hit

You're fine running 87 in all of them, the EB is just the one that suffers the biggest HP hit because the turbo relies on that premium fuel (it's why on the Ford Mustang page there is an * next to the EB HP/TQ figures). If you run 87 in the EB and really just want the car for your DD and once in a while fun, then honestly 87 is fine for it. You'll save lots of money. Now if you plan on doing more fun things with it then you should be running 93 in it.

All cars built in America supposedly are required to run on 87 octane.

 

[Asharus]

that 1% hit is why i use 93, even though that's pretty dumb

 

[89Trooper]

that 1% hit is why i use 93, even though that's pretty dumb

I'm good with 430.65 HP.

 

[Asharus]

lol yeah, i think i may switch after my first oil change, or something, anything i can find an excuse for.

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