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95mustanggt · 07-26-2003, 07:55 AM

Always use the LOWEST octane you can get away with. IE 87 octane for your 03 vert. If you buy that Cobra, you'll have to run 91 octane, but the engine compression and timing are designed for it. The GT is designed for 87 octane.

07-26-2003, 07:55 AM	#4
95mustanggt Registered Member Join Date: May 2000 Location: Kamloops, BC Posts: 2,875	Always use the LOWEST octane you can get away with. IE 87 octane for your 03 vert. If you buy that Cobra, you'll have to run 91 octane, but the engine compression and timing are designed for it. The GT is designed for 87 octane. __________________ 1995 Mustang GT 20016 F150 Lariat Super Crew