Recommended octane

[Mr.PP2]

Can you run 87 octane in a unmodified 18/19 GT?

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[ihc95]

Yes you can, but I personally don't due to the high 12:1 compression ratio and the fact that you lose some power on 87 vs 93.

 

[Kep4]

According to your Owners Manual, yes.

 

[Ghost50]

Like the others said, yes you can.

But when I switched over to the 93 the difference was noticeable to me.

 

[Mr. Met]

 

[Andy13186]

Just dont.. just get a damn 4 cylinder or some shitbox if you dont want to even spend the extremely small amount of extra $.

Or just get an e85 tune

 

[AZ18yote]

Or just get an e85 tune

If available in your area this is the way to go. Or flex so can switch back and forth between e and 9x (skip the 8x)

 

[Zinc03svt]

Real simple. E85. Move if you have too. Lol.

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