Octane for gt dd?

[diegocarvallo89]

Hey guys. I used the search button but couldn't come up with anything :/

What octane do you use on your mustang gt for dd?
The guy at dealer told me I could run the 87. any thoughts on this? I am concerned of damaging the engine over time if I end up using 87 like dealer advised. I do understand with premium gas the car will do better performance wise.
Any thoughts?

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[bmatt]

Prepare for some incoming flak, there are many threads on this. Bottom line, 87 is perfectly fine. Totally up to you.

 

[Exikutioner]

My dealer also said 87 was fine. You won't harm the engine by running higher octane fuel, just your wallet.

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[Khyber]

we've covered this extensively, yes. it's in the manual. 87 but run what you want. I will say I've been running 93 last two fill ups now and I don't know if there is really a difference but accelerating feels a little smoother but it hasn't improved mpg at all thanks to my recently installed corsa xtreme lol.

 

[Braski]

87 is fine but I personally use 93.

 

[jrt6]

Get whatever your wallet can handle. The manual says the minimum is 87. I run 93 because of the high compression ratio the coyote motors have.

 

[plc268]

You lose something like 5 hp on 87 octane. Not really a whole lot to worry about.

 

[50hhh]

I mean if you wanna run 87 you can. But I put 91 or higher in my high compression performance v8.

 

[Socalmustang]

cali only goes up to 91...I always go 91, I'm sure 87 is perfectly fine, but I sleep better knowing I have premium. Couple dollar more makes no difference to me.

 

[skeeter]

I treat the s550 like it is something special by running 93 with a 93 tune.
Sure, 87 is fine but I just don't get it.

 

[Derek@Lethal]

You are perfectly fine running 87 octane in the coyotes. 1) These motors have very efficient combustion chambers, that's one reason why you can run 87 with 11:1 compression in this motor. 2) The knock sensors add or remove timing depending on fuel quality.

There will be a slight power difference at WOT between 87 and premium, but probably not enough to actually feel. In the end, you are fine with 87 in your car.

 

[fionic]

are you really going to save much money not going with 93? who cares, just use 93.

 

[Zemedici]

I've gotten used to putting 93 in my girls car (supercharged) so I just put the same in mine out of habit :(

 

[Khyber]

are you really going to save much money not going with 93? who cares, just use 93.

if you add it up over a years time, then its a decent amount of difference. that difference could be mods or food lol

 

[LETHAL]

If you believe all the "good for your engine" hoopla in reference to detergents and cleaners in premium gas, it may be worth it. LOL That said, I use 93..

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