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ws6fiero · 06-05-2003, 11:14 PM

So what does the owners manual say on cars with the 2.5? If it does indeed suggest premium, then I would guess that your base timing curve is set for premium and using 87 causes it to retard your timing (with a noticable stumble on acceleration).

edit: I guess I'm making up things in my head about the reccomending premium thing... everything I found suggests regular. I guess that if your car has a knock sensor it might be advancing timing a little

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06-05-2003, 11:14 PM	#6
ws6fiero Scooby Newbie Member#: 33067 Join Date: Feb 2003 Chapter/Region: MWSOC Location: MI Vehicle: 1998 Legacy Wagon Spruce Pearl	So what does the owners manual say on cars with the 2.5? If it does indeed suggest premium, then I would guess that your base timing curve is set for premium and using 87 causes it to retard your timing (with a noticable stumble on acceleration). edit: I guess I'm making up things in my head about the reccomending premium thing... everything I found suggests regular. I guess that if your car has a knock sensor it might be advancing timing a little * Registered users of the site do not see these ads. Last edited by ws6fiero; 06-05-2003 at 11:22 PM.