4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

premium?

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Old Aug 29, 2009 | 07:23 PM
  #1  
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jgordon
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Default premium?

hi there,i have a 01 gt below the speedometer it says premium unleaded,i didnt notice that when i took a test drive,and i was using 87 octane,but i downloaded a owners manual and it says to use at least 87 octane?
Old Aug 29, 2009 | 07:36 PM
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It sounds as though someone installed a Cobra gauge set or gauge faces...
Old Aug 29, 2009 | 07:42 PM
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the 01 gt does use 87 octane then,right?
Old Aug 29, 2009 | 08:09 PM
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Originally Posted by jgordon
the 01 gt does use 87 octane then,right?
Correct, unless the owner before you had a tune in it for (91 or 93) based on where you live and he changed out the gauge cluster.
Old Aug 29, 2009 | 08:09 PM
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yes, it is meant to run on 87, unless you have a tune
Old Aug 30, 2009 | 02:55 AM
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take a picture of your gauge cluster and post it. I bet you have a mach 1 or cobra cluster.
Old Aug 30, 2009 | 09:52 AM
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Even the aftermarket gauges say premium unleaded, I know the one AM sells does. Yeah, unless it has be tuned for premium it is just regular 87.
Old Aug 31, 2009 | 11:21 AM
  #8  
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i bought the car from a dealer just a couple weeks ago,and he did say someone put a new cluster in.but how would i know if a tune was done?
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