Ford Mustang Forum - View Single Post - Colder Plugs
Thread: Colder Plugs
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post #5 of (permalink) Old 01-29-2006 Thread Starter
jrspony
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Joined: Jun 2005
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Well maybe its detonation...The car was my dads before he gave it to me, so i know it hasn't had a 91 octane tune or anything like that. I always fill up with Shell V-power, so i don't think its the gas. The knocking isn't bad with premium, but i'm just tired of paying the $.10 extra for every gallon...
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