Thread: What are the possible reasons for eating too much gas (grand prix 98 gt v6 3.8L)

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  1. #1 Re: What are the possible reasons for eating too much gas (grand prix 98 gt v6 3.8L) 
    tc300
    tc300 is offline
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    Default 08-21-2012
    Use higher octane gas.... I get better mpg and car seems to run a bit better also.
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  2. #2 Re: What are the possible reasons for eating too much gas (grand prix 98 gt v6 3.8L) 
    raverockstar
    raverockstar is offline
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    Default 08-21-2012
    But then it's gonna cost the same lol.
    Grand Prix gt 1999 v6 3.8L coupe.
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