Thread: What gas octan to use with 1998 grand prix gt v6 3.8L ?

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#9 Re: What gas octan to use with 1998 grand prix gt v6 3.8L ?
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08-18-2012

been using 87 in my GT for all 11 years we've had her...

2001 Grand Prix GT - stock (for now )
2007 Trailblazer SS - back under the knife , motor #4 on the way

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1998, 38l, gas, grand, octan, prix

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