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2003 mustang gt supercharged 91 or 94?

Old 11-09-2018, 06:50 PM
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2003 mustang gt supercharged 91 or 94?

What should I use when I buy the vehicle? Is regular gas out of the question?
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Old 11-09-2018, 07:08 PM
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Depends on what the tune is written for, err on the side of caution if you don't know and go 94 maybe.

I would think with any supercharged vehicle regular gas is pretty much out of the question, if you're buying forced induction and worrying about running regular gas to save a few bucks, its likely the wrong vehicle for you.
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Old 11-09-2018, 09:16 PM
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If its stock 91 is what Ford recommends for supercharged vehicles. Aftermarket tune could be anything.
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Old 11-09-2018, 10:03 PM
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Definitely use 94 unless you have it retuned for 91
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Old 11-10-2018, 07:17 PM
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What they said, min 91, 94 on the safe side.
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