What fuel for new GT?

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09-30-2014, 05:54 PM

CCCP1999

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Join Date: Oct 2013

Location: Florida

Posts: 56

What fuel for new GT?

Do the 2011 and up GT's run on 87 reg or have to have 91 octane?

09-30-2014, 06:10 PM

Csrt4to5.0gt

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Join Date: Jun 2013

Location: Pennsylvania

Posts: 352

They can run just fine on 87 but optimized for premium. You lose a few ponies running 87 but everyday normal driving it probably goes unnoticed.

09-30-2014, 06:21 PM

CCCP1999

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Join Date: Oct 2013

Location: Florida

Posts: 56

Thanks. My C6 vette needed 91. I know my older 03 GT used Reg. Just was not sure with the new 5.0 as my company pays for my gas and will only pay for 87.

10-01-2014, 08:30 AM

05 Mustang

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Location: Canton, Georgia

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As the others have said, 87 is fine

10-01-2014, 09:51 AM

kevinmalec

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Location: Acworth, GA

Posts: 3,666

87 octane is fine, unless you have a custom tune that requires a higher octane.

10-01-2014, 12:59 PM

jhawkr

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Join Date: Apr 2010

Location: Kansas

Posts: 240

My 2014 GT runs great on 87. My gas mileage doesn't even change. I'm sure I lose a few HP on the top end that I wasn't using anyway.

10-01-2014, 09:24 PM

Nuke

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Location: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)

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Read the OM. It spells it out. But a custom tune will gain more with 87 as well as higher octanes than the stock tune will.

10-02-2014, 09:21 PM

cruisin5268d

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Join Date: Mar 2014

Location: Austin, Texas

Posts: 1,155

The answers that you seek are in the owners manual. Not sure where the confusion comes from.

If you want the extra performance go with 91/93. If you don't then don't.