Posted by: Marteniuk
Required Fuel Octane - 05/24/07 09:32 PM
Does anyone know the required octane for a 1998 Grand Prix GTP? is it 89? or 91?
Posted by: theone2043
Re: Required Fuel Octane - 05/24/07 09:33 PM
i think its what ever the highest is in your area and depending on your mods
Posted by: RooK
Re: Required Fuel Octane - 05/24/07 09:45 PM
91 minimum for a stock GTP.