Hi,</P>


I want to know what is the recommand octane gas indice to use for my Mustang GT 2001 4.6 ? And what ohter indice are possible. Where can I fin this information ?</P>


Thanks</P>


Jean, Montreal, Canada</P>

 

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You can find it in your owner's manual..the recommended Octane rating (not indice) is 87 , but if you do power adders to your engine then you have to go as high as 93, even 103 (race fuel).</P>

 

so up the timing and use 89...